Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > sci.physics.relativity > #365898 > unrolled thread
| Started by | Kent Beeler <kenbee@jefffast.au> |
|---|---|
| First post | 2015-10-01 19:18 +0000 |
| Last post | 2015-10-04 18:50 -0400 |
| Articles | 20 on this page of 167 — 20 participants |
Back to article view | Back to sci.physics.relativity
LIGO experiment seen gravitational waves? Kent Beeler <kenbee@jefffast.au> - 2015-10-01 19:18 +0000
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-01 22:00 +0200
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-02 05:58 +0200
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-03 07:10 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-03 04:02 -0700
Re: LIGO experiment seen gravitational waves? Kent Beeler <kenbee@jefffast.au> - 2015-10-03 15:03 +0000
Re: LIGO experiment seen gravitational waves? Kent Beeler <kenbee@jefffast.au> - 2015-10-03 15:00 +0000
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-03 21:31 +0200
Re: LIGO experiment seen gravitational waves? Kent Beeler <kenbee@jefffast.au> - 2015-10-03 21:20 +0000
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-04 05:30 +0200
Re: LIGO experiment seen gravitational waves? shuba <tim@sh.uba> - 2015-10-04 06:14 +0000
Re: LIGO experiment seen gravitational waves? Kent Beeler <kenbee@jefffast.au> - 2015-10-04 17:07 +0000
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-04 22:32 +0200
Re: LIGO experiment seen gravitational waves? Kent Beeler <kenbee@jefffast.au> - 2015-10-04 20:51 +0000
Re: LIGO experiment seen gravitational waves? gilber34 <fafa@invalid.com> - 2015-10-04 16:39 -0500
Re: LIGO experiment seen gravitational waves? John Heath <heathjohn2@gmail.com> - 2015-10-04 16:07 -0700
Re: LIGO experiment seen gravitational waves? shuba <tim@sh.uba> - 2015-10-05 05:33 +0000
Re: LIGO experiment seen gravitational waves? John Heath <heathjohn2@gmail.com> - 2015-10-04 23:44 -0700
Re: LIGO experiment seen gravitational waves? shuba <tim@sh.uba> - 2015-10-05 08:02 +0000
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-05 21:44 +0200
Re: LIGO experiment seen gravitational waves? shuba <tim@sh.uba> - 2015-10-06 22:31 +0000
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-07 02:36 +0200
Re: LIGO experiment seen gravitational waves? shuba <tim@sh.uba> - 2015-10-07 01:55 +0000
Re: LIGO experiment seen gravitational waves? shuba <tim@sh.uba> - 2015-10-07 19:59 +0000
Re: LIGO experiment seen gravitational waves? kefischer <emoneyjoe@iglou.com> - 2015-10-07 17:00 -0400
Re: LIGO experiment seen gravitational waves? shuba <tim@sh.uba> - 2015-10-07 23:33 +0000
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-08 06:13 +0200
Re: LIGO experiment seen gravitational waves? Tom Roberts <tjroberts137@sbcglobal.net> - 2015-10-08 11:32 -0500
Re: LIGO experiment seen gravitational waves? Natalina Nazvarova <natana42@hotmail.com> - 2015-10-08 17:06 +0000
Re: LIGO experiment seen gravitational waves? John Gogo <jfgogo22@yahoo.com> - 2015-10-09 19:11 -0700
Re: LIGO experiment seen gravitational waves? Natalina Nazvarova <natana42@hotmail.com> - 2015-10-10 11:42 +0000
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-10 06:24 +0200
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-11 19:00 -0700
Re: LIGO experiment seen gravitational waves? shuba <tim@sh.uba> - 2015-10-08 17:18 +0000
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-08 20:25 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-08 13:04 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-09 08:25 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-09 05:25 -0700
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-10-09 05:52 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-10 06:55 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-10 04:41 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-14 05:00 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-13 20:06 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-14 22:03 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-14 14:45 -0700
Re: LIGO experiment seen gravitational waves? xxein1@att.net - 2015-10-14 19:59 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-15 05:03 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-15 05:21 -0700
Re: LIGO experiment seen gravitational waves? xxein1@att.net - 2015-10-15 06:33 -0700
Re: LIGO experiment seen gravitational waves? xxein1@att.net - 2015-10-15 06:46 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-15 07:58 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-15 08:38 -0700
Re: LIGO experiment seen gravitational waves? kefischer <emoneyjoe@iglou.com> - 2015-10-15 14:13 -0400
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-15 21:23 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-15 13:28 -0700
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-10-19 00:43 -0700
Re: LIGO experiment seen gravitational waves? Tom Roberts <tjroberts137@sbcglobal.net> - 2015-10-16 10:26 -0500
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-17 07:35 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-17 03:20 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-18 06:49 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-18 05:02 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-18 22:37 +0200
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-18 14:03 -0700
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-18 15:34 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-19 05:21 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-18 20:56 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-19 20:56 +0200
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-19 12:14 -0700
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-19 13:40 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-20 05:07 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-19 21:07 -0700
Re: LIGO experiment seen gravitational waves? shuba <tim@sh.uba> - 2015-10-20 07:59 +0000
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-10-20 01:26 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-20 21:37 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-20 13:59 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-21 05:03 +0200
Re: LIGO experiment seen gravitational waves? kefischer <emoneyjoe@iglou.com> - 2015-10-20 23:38 -0400
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-21 04:22 -0700
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-10-21 05:03 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-24 04:19 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-23 20:08 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-24 08:24 +0200
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-24 04:04 -0700
Re: LIGO experiment seen gravitational waves? Erebus Xanthopoulos <elefxa@spacepark.au> - 2015-10-24 11:13 +0000
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-25 05:29 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-25 04:36 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-26 04:42 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-26 03:49 -0700
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-10-26 05:03 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-27 01:43 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-26 20:27 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-27 05:50 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-27 04:22 -0700
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-10-27 04:59 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-28 05:07 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-28 04:10 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-29 05:49 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-29 04:29 -0700
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-10-29 05:22 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-29 19:33 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-29 14:10 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-30 07:00 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-30 05:00 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-31 06:21 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-10-31 04:28 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-11-01 05:49 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-11-01 05:01 -0800
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-11-02 04:35 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-11-02 03:21 -0800
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-11-02 03:38 -0800
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-11-05 04:46 +0100
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-11-01 07:55 +0100
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-10-20 23:08 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-19 07:04 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-17 05:58 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-17 06:18 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-17 06:33 -0700
Re: LIGO experiment seen gravitational waves? kefischer <emoneyjoe@iglou.com> - 2015-10-17 10:24 -0400
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-17 11:57 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-17 12:25 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-17 12:43 -0700
Re: LIGO experiment seen gravitational waves? fuller.david@hotmail.com - 2015-10-17 06:30 -0700
Re: LIGO experiment seen gravitational waves? Tom Roberts <tjroberts137@sbcglobal.net> - 2015-10-17 10:06 -0500
Re: LIGO experiment seen gravitational waves? Koobee Wublee <koobee.wublee@gmail.com> - 2015-10-18 00:07 -0700
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-11-07 05:50 +0100
Re: LIGO experiment seen gravitational waves? Gary Harnagel <hitlong@yahoo.com> - 2015-11-07 05:08 -0800
Re: LIGO experiment seen gravitational waves? Tom Roberts <tjroberts137@sbcglobal.net> - 2015-11-07 09:16 -0600
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-11-07 18:46 +0100
Re: LIGO experiment seen gravitational waves? Odd Bodkin <bodkinodd@gmail.com> - 2015-11-09 08:04 -0600
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-11-09 06:13 -0800
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-09 06:49 -0800
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-11-09 07:08 -0800
Re: LIGO experiment seen gravitational waves? Tom Roberts <tjroberts137@sbcglobal.net> - 2015-11-09 22:32 -0600
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-11-09 23:35 -0800
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-10 03:24 -0800
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-11-10 03:36 -0800
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-10 04:07 -0800
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-11-10 04:53 -0800
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-10 05:21 -0800
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-11-10 05:39 -0800
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-10 05:56 -0800
Re: LIGO experiment seen gravitational waves? mlwozniak@wp.pl - 2015-11-10 06:42 -0800
Re: LIGO experiment seen gravitational waves? Open Collector <openc@opencollector.org> - 2015-11-10 15:04 +0000
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-10 07:10 -0800
Re: LIGO experiment seen gravitational waves? Maciej Woźniak <mlwozniak@wp.pl> - 2015-11-11 09:59 +0100
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-11 02:53 -0800
Re: LIGO experiment seen gravitational waves? Maciej Woźniak <mlwozniak@wp.pl> - 2015-11-11 12:10 +0100
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-11 05:02 -0800
Re: LIGO experiment seen gravitational waves? Maciej Woźniak <mlwozniak@wp.pl> - 2015-11-11 14:49 +0100
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-11 06:02 -0800
Re: LIGO experiment seen gravitational waves? kefischer <emoneyjoe@iglou.com> - 2015-11-11 09:37 -0500
Re: LIGO experiment seen gravitational waves? Open Collector <openc@opencollector.org> - 2015-11-10 14:58 +0000
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-10 04:09 -0800
Re: LIGO experiment seen gravitational waves? Ludwig Böhm <ludwb@widespectrum.com> - 2015-11-12 00:02 +0000
Re: LIGO experiment seen gravitational waves? Tom Roberts <tjroberts137@sbcglobal.net> - 2015-11-10 09:17 -0600
Re: LIGO experiment seen gravitational waves? Maciej Woźniak <mlwozniak@wp.pl> - 2015-11-11 10:06 +0100
Re: LIGO experiment seen gravitational waves? Open Collector <openc@opencollector.org> - 2015-11-09 19:03 +0000
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-09 14:48 -0800
Re: LIGO experiment seen gravitational waves? Ludwig Böhm <ludwb@widespectrum.com> - 2015-11-12 00:08 +0000
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-11 16:50 -0800
Re: LIGO experiment seen gravitational waves? Ludwig Böhm <ludwb@widespectrum.com> - 2015-11-12 16:30 +0000
Re: LIGO experiment seen gravitational waves? paparios <paparios@gmail.com> - 2015-11-12 09:08 -0800
Re: LIGO experiment seen gravitational waves? shuba <tim@sh.uba> - 2015-10-09 19:45 +0000
Re: LIGO experiment seen gravitational waves? kefischer <emoneyjoe@iglou.com> - 2015-10-09 19:18 -0400
Re: LIGO experiment seen gravitational waves? Odd Bodkin <bodkinodd@gmail.com> - 2015-10-11 16:11 -0500
Re: LIGO experiment seen gravitational waves? Thomas Heger <ttt_heg@web.de> - 2015-10-10 06:29 +0200
Re: LIGO experiment seen gravitational waves? kefischer <emoneyjoe@iglou.com> - 2015-10-04 18:50 -0400
Page 1 of 9 [1] 2 3 4 5 6 7 8 9 Next page →
| From | Kent Beeler <kenbee@jefffast.au> |
|---|---|
| Date | 2015-10-01 19:18 +0000 |
| Subject | LIGO experiment seen gravitational waves? |
| Message-ID | <muk0tc$1ln$1@speranza.aioe.org> |
On 25 September, a sensational rumour appeared on Twitter: Lawrence Krauss, a cosmologist, reported hearing that the world’s largest gravitational-wave observatory had seen a signal, barely a week after its official re-opening. http://www.nature.com/news/has-giant-ligo-experiment-seen-gravitational-waves-1.18449?WT.mc_id=SFB_NNEWS_1508_RHBox
[toc] | [next] | [standalone]
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Date | 2015-10-01 22:00 +0200 |
| Message-ID | <d75hn3Fq1boU1@mid.individual.net> |
| In reply to | #365898 |
Am 01.10.2015 21:18, schrieb Kent Beeler: > On 25 September, a sensational rumour appeared on Twitter: > Lawrence Krauss, a cosmologist, reported hearing that the > world’s largest gravitational-wave observatory had seen a > signal, barely a week after its official re-opening. > > http://www.nature.com/news/has-giant-ligo-experiment-seen-gravitational-waves-1.18449?WT.mc_id=SFB_NNEWS_1508_RHBox Isn't Earth gravity caused by the Earth? So: what exactly does LIGO measure and what is a 'gravitational wave'? If something happens with our homeplanet or if the Earth is 'catching' some sort of remote influences, this could eventually cause such a wave. But somehow I thought they wanted to measure remote galaxies, merging of black holes or the remains of the big-bang (or something like that). But I don't think, this could work, since the Earth is much closer than such galaxies. TH
[toc] | [prev] | [next] | [standalone]
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Date | 2015-10-02 05:58 +0200 |
| Message-ID | <d76dnrF1qneU1@mid.individual.net> |
| In reply to | #365900 |
Am 01.10.2015 22:00, schrieb Thomas Heger: > Am 01.10.2015 21:18, schrieb Kent Beeler: >> On 25 September, a sensational rumour appeared on Twitter: >> Lawrence Krauss, a cosmologist, reported hearing that the >> world’s largest gravitational-wave observatory had seen a >> signal, barely a week after its official re-opening. >> >> http://www.nature.com/news/has-giant-ligo-experiment-seen-gravitational-waves-1.18449?WT.mc_id=SFB_NNEWS_1508_RHBox >> > > > Isn't Earth gravity caused by the Earth? > > So: what exactly does LIGO measure and what is a 'gravitational wave'? > > If something happens with our homeplanet or if the Earth is 'catching' > some sort of remote influences, this could eventually cause such a wave. > > But somehow I thought they wanted to measure remote galaxies, merging of > black holes or the remains of the big-bang (or something like that). > > But I don't think, this could work, since the Earth is much closer than > such galaxies. > The distance plays a mayor role in gravity, since gravity follows an inverse square law. The LIGO experiment has a distance to Earth surface of zero and we find usual Earth gravity there. The influence of gravity from nearest galaxies is quite small, since the nearest galaxy outside the milky way is https://en.wikipedia.org/wiki/Canis_Major_Overdensity and that 28,000 lightyears away. The nearest mayor galaxy is Andromeda and that 2.5 million lightyears away. This is certainly far enough to leave little traces of its gravity measurable here on Earth. But actually not gravity should be measured by LIGO, but ripples within. I don't think it's possible, but imagine the Andromeda galaxy could switch its own gravity on and off once a minute. We then would have a gravity square-wave of 1/60 Hz. This would be a tremendous wave, since gravity of a galaxy is rather huge. But this wave gets weaker by an inverse square law. And distance to Andromeda is a fantastically large number (in meters). Now this number needs to be squared and by this number, the wave gets smaller. TH
[toc] | [prev] | [next] | [standalone]
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Date | 2015-10-03 07:10 +0200 |
| Message-ID | <d796b7FmnftU1@mid.individual.net> |
| In reply to | #365923 |
Am 02.10.2015 05:58, schrieb Thomas Heger: > Am 01.10.2015 22:00, schrieb Thomas Heger: >> Am 01.10.2015 21:18, schrieb Kent Beeler: >>> On 25 September, a sensational rumour appeared on Twitter: >>> Lawrence Krauss, a cosmologist, reported hearing that the >>> world’s largest gravitational-wave observatory had seen a >>> signal, barely a week after its official re-opening. >>> >>> http://www.nature.com/news/has-giant-ligo-experiment-seen-gravitational-waves-1.18449?WT.mc_id=SFB_NNEWS_1508_RHBox >>> >>> >> >> >> Isn't Earth gravity caused by the Earth? >> >> So: what exactly does LIGO measure and what is a 'gravitational wave'? >> >> If something happens with our homeplanet or if the Earth is 'catching' >> some sort of remote influences, this could eventually cause such a wave. >> >> But somehow I thought they wanted to measure remote galaxies, merging of >> black holes or the remains of the big-bang (or something like that). >> >> But I don't think, this could work, since the Earth is much closer than >> such galaxies. >> > > The distance plays a mayor role in gravity, since gravity follows an > inverse square law. > > The LIGO experiment has a distance to Earth surface of zero and we find > usual Earth gravity there. > > The influence of gravity from nearest galaxies is quite small, since the > nearest galaxy outside the milky way is > > https://en.wikipedia.org/wiki/Canis_Major_Overdensity > > and that 28,000 lightyears away. > > The nearest mayor galaxy is Andromeda and that 2.5 million lightyears > away. This is certainly far enough to leave little traces of its gravity > measurable here on Earth. > > But actually not gravity should be measured by LIGO, but ripples within. > > I don't think it's possible, but imagine the Andromeda galaxy could > switch its own gravity on and off once a minute. We then would have a > gravity square-wave of 1/60 Hz. > > This would be a tremendous wave, since gravity of a galaxy is rather huge. > > But this wave gets weaker by an inverse square law. And distance to > Andromeda is a fantastically large number (in meters). Now this number > needs to be squared and by this number, the wave gets smaller. > I haven't figured that out, but actually there 'gravitational waves' on Earth: a truck passes by on the street, than we are attracted by the moving mass of the truck. Only the force is VERY small. But a very sensitive detector of gravity waves could eventually detect such an influence (bird flying by, bee sitting on the detector, wind against the building or similar). Now such unwanted disturbance should be compared to the effect a device tries to measure. The effect should then be a few orders of magnitude larger than unavoidable 'noise', since otherwise the measurement will not work. Now I assume, that gravity waves caused by remote galaxies are smaller than the effect of fly poo. TH
[toc] | [prev] | [next] | [standalone]
| From | Gary Harnagel <hitlong@yahoo.com> |
|---|---|
| Date | 2015-10-03 04:02 -0700 |
| Message-ID | <4e3001e9-cfef-49b9-a3e8-4714d3a4ff44@googlegroups.com> |
| In reply to | #366071 |
On Friday, October 2, 2015 at 11:11:08 PM UTC-6, Thomas Heger wrote: > > Am 02.10.2015 05:58, schrieb Thomas Heger: > I haven't figured that out, but actually there 'gravitational waves' on > Earth: > > a truck passes by on the street, than we are attracted by the moving > mass of the truck. > > Only the force is VERY small. But a very sensitive detector of gravity > waves could eventually detect such an influence (bird flying by, bee > sitting on the detector, wind against the building or similar). > > Now such unwanted disturbance should be compared to the effect a device > tries to measure. > > The effect should then be a few orders of magnitude larger than > unavoidable 'noise', since otherwise the measurement will not work. > > Now I assume, that gravity waves caused by remote galaxies are smaller > than the effect of fly poo. > > > TH The LIGO experiment consists of TWO detectors separated by a large distance (one in Washington state, the other in Louisiana): https://ligo.caltech.edu/page/observatories-collaborations so a truck going by one will not produce a coincidence event. Furthermore, each detector consists of a pair of 2 km arms at 90 degrees, so a truck would only affect a small part of the instrument. And even further more, there is another detector network in Italy that they collaborate with. Gary
[toc] | [prev] | [next] | [standalone]
| From | Kent Beeler <kenbee@jefffast.au> |
|---|---|
| Date | 2015-10-03 15:03 +0000 |
| Message-ID | <muoqn7$j7c$1@speranza.aioe.org> |
| In reply to | #366075 |
Gary Harnagel wrote: > Furthermore, > each detector consists of a pair of 2 km arms at 90 degrees, so a truck > would only affect a small part of the instrument. And even further > more,there is another detector network in Italy that they collaborate > with. So the sensing element would be based on what physics ... piezoelectric?
[toc] | [prev] | [next] | [standalone]
| From | Kent Beeler <kenbee@jefffast.au> |
|---|---|
| Date | 2015-10-03 15:00 +0000 |
| Message-ID | <muoqii$j7d$1@speranza.aioe.org> |
| In reply to | #366071 |
Thomas Heger wrote: >>> Isn't Earth gravity caused by the Earth? That's considered to be constant, not waving. >>> If something happens with our homeplanet or if the Earth is 'catching' >>> some sort of remote influences, this could eventually cause such a >>> wave. That wave amplitude would be magnitude insignificant compared to that of Earth. However, in principle that wave could be filtered out by a proper LP filter applied numerically to the received data. >>> But somehow I thought they wanted to measure remote galaxies, merging >>> of black holes or the remains of the big-bang (or something like >>> that).But I don't think, this could work, since the Earth is much >>> closer than such galaxies. Does not matter, you lack experience in physics and mathematics. Reread what I wrote.
[toc] | [prev] | [next] | [standalone]
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Date | 2015-10-03 21:31 +0200 |
| Message-ID | <d7aooeF4hoiU1@mid.individual.net> |
| In reply to | #366088 |
Am 03.10.2015 17:00, schrieb Kent Beeler: > Thomas Heger wrote: > >>>> Isn't Earth gravity caused by the Earth? > > That's considered to be constant, not waving. > Why? E.g. we have several events, that could possibly have an effect on gravity: volcano eruptions, earthquakes or movements of plates. Possibly there are other influences, like changes in the sun or in the connection of Sun to Earth. >>>> If something happens with our homeplanet or if the Earth is 'catching' >>>> some sort of remote influences, this could eventually cause such a >>>> wave. > > That wave amplitude would be magnitude insignificant compared to that of > Earth. However, in principle that wave could be filtered out by a proper LP > filter applied numerically to the received data. If waves are filtered out, than what waves could the device actually measure? It is certainly possible to filter out certain waves (and keep the rest). But what would you like to filter out and what would you like to keep? TH
[toc] | [prev] | [next] | [standalone]
| From | Kent Beeler <kenbee@jefffast.au> |
|---|---|
| Date | 2015-10-03 21:20 +0000 |
| Message-ID | <mupgqr$52p$1@speranza.aioe.org> |
| In reply to | #366102 |
Thomas Heger wrote: >> That wave amplitude would be magnitude insignificant compared to that >> of Earth. However, in principle that wave could be filtered out by a >> proper LP filter applied numerically to the received data. > > If waves are filtered out, than what waves could the device actually > measure Well, I meant taking out the Earth's offset, since the frequency of that wave must be in the Lower region. Sort of taking the DC out, or moving the zero axis up to the necessary level. Is done in software anyway.
[toc] | [prev] | [next] | [standalone]
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Date | 2015-10-04 05:30 +0200 |
| Message-ID | <d7bkqpFatteU1@mid.individual.net> |
| In reply to | #366103 |
Am 03.10.2015 23:20, schrieb Kent Beeler: >>> That wave amplitude would be magnitude insignificant compared to that >>> of Earth. However, in principle that wave could be filtered out by a >>> proper LP filter applied numerically to the received data. >> >> If waves are filtered out, than what waves could the device actually >> measure > > Well, I meant taking out the Earth's offset, since the frequency of that > wave must be in the Lower region. Sort of taking the DC out, or moving the > zero axis up to the necessary level. Is done in software anyway. The LIGO experiment is based on a certain idea about how gravity actually functions, which I think is wrong. This would make me a little sceptic about the theoretical foundations of this experiment. The experiment can detect something and filter out another something. Finally they can measure something. But actually what? TH
[toc] | [prev] | [next] | [standalone]
| From | shuba <tim@sh.uba> |
|---|---|
| Date | 2015-10-04 06:14 +0000 |
| Message-ID | <muqg4s$v5f$1@speranza.aioe.org> |
| In reply to | #366129 |
Thomas Heger wrote:
> The LIGO experiment is based on a certain idea about how gravity
> actually functions, which I think is wrong.
Gravitational waves are an unambiguous prediction of general
relativity, which you repeatedly say "is true". So it's obvious
that you either have no idea what you think or have very little
idea about how general relativity actually works. Likely both.
> Finally they can measure something. But actually what?
This may be too radical an idea for someone who rejects every
aspect of modern science and detests all its practitioners, but you
could go study the subject instead of writing uninformed bullshit.
There's a huge amount of information available from which to learn.
---Tim Shuba---
[toc] | [prev] | [next] | [standalone]
| From | Kent Beeler <kenbee@jefffast.au> |
|---|---|
| Date | 2015-10-04 17:07 +0000 |
| Message-ID | <murmbt$bp1$1@speranza.aioe.org> |
| In reply to | #366129 |
Thomas Heger wrote: > Am 03.10.2015 23:20, schrieb Kent Beeler: > >>>> That wave amplitude would be magnitude insignificant compared to that >>>> of Earth. However, in principle that wave could be filtered out by a >>>> proper LP filter applied numerically to the received data. >>> >>> If waves are filtered out, than what waves could the device actually >>> measure >> >> Well, I meant taking out the Earth's offset, since the frequency of >> that wave must be in the Lower region. Sort of taking the DC out, or >> moving the zero axis up to the necessary level. Is done in software >> anyway. > > The LIGO experiment is based on a certain idea about how gravity > actually functions, which I think is wrong. We disagree. To me gravity is not something that function, but something that just is. I am unaware about how they do it by LIGO, I suppose they are using their brain. > This would make me a little sceptic about the theoretical foundations of > this experiment. The experiment can detect something and filter out > another something. Finally they can measure something. But actually what? They may only discard the offset, noise/transients and whatever unrelated perturbation. Never the signal detected. Everything ELSE, but not the received data through that channel or channels. (I assume they are listening to many channels/frequencies). In principle that thing must be sort of Gravity Telescope.
[toc] | [prev] | [next] | [standalone]
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Date | 2015-10-04 22:32 +0200 |
| Message-ID | <d7dgnlFplv4U1@mid.individual.net> |
| In reply to | #366153 |
Am 04.10.2015 19:07, schrieb Kent Beeler: > Thomas Heger wrote: > >> Am 03.10.2015 23:20, schrieb Kent Beeler: >> >>>>> That wave amplitude would be magnitude insignificant compared to that >>>>> of Earth. However, in principle that wave could be filtered out by a >>>>> proper LP filter applied numerically to the received data. >>>> >>>> If waves are filtered out, than what waves could the device actually >>>> measure >>> >>> Well, I meant taking out the Earth's offset, since the frequency of >>> that wave must be in the Lower region. Sort of taking the DC out, or >>> moving the zero axis up to the necessary level. Is done in software >>> anyway. >> >> The LIGO experiment is based on a certain idea about how gravity >> actually functions, which I think is wrong. > > We disagree. To me gravity is not something that function, but something > that just is. I am unaware about how they do it by LIGO, I suppose they > are using their brain. No, we do not disagree, since you certainly assume, that gravity is an effect, that occurs in nature. We can see this effect, we can measure it and even feel it. So there is some aspect of nature, we call 'gravity'. This is an effect, that has some kind of reason and this is, what I call 'function'. What I want to say is, that gravity has a physical reason and is not just there. We know, that gravity makes thing drop and follows an inverse square law (diminishes with distance squared). Now my problem: LIGO is directly on the surface of planet Earth and Andromeda a few million light-years away. This distance squared gives a fantastically large number, hence the effect of gravity caused by remote galaxies should be incredibly small. And this makes me wonder, what actually the LIGO experiment tries to measure. TH
[toc] | [prev] | [next] | [standalone]
| From | Kent Beeler <kenbee@jefffast.au> |
|---|---|
| Date | 2015-10-04 20:51 +0000 |
| Message-ID | <mus3fl$gm3$1@speranza.aioe.org> |
| In reply to | #366165 |
Thomas Heger wrote: > This distance squared gives a fantastically large number, hence the > effect of gravity caused by remote galaxies should be incredibly small. > And this makes me wonder, what actually the LIGO experiment tries to > measure. It must be about large wavelengths, hence the need of large distances among the involved detectors. The distance to the source is not really a problem, after a while the amplitude settles to an almost constant value.
[toc] | [prev] | [next] | [standalone]
| From | gilber34 <fafa@invalid.com> |
|---|---|
| Date | 2015-10-04 16:39 -0500 |
| Message-ID | <mus6af$ms3$1@speranza.aioe.org> |
| In reply to | #366165 |
On 10/4/2015 3:32 PM, Thomas Heger wrote: > Am 04.10.2015 19:07, schrieb Kent Beeler: >> Thomas Heger wrote: >> >>> The LIGO experiment is based on a certain idea about how gravity >>> actually functions, which I think is wrong. >> > > We know, that gravity makes thing drop and follows an inverse square law > (diminishes with distance squared). > > > Now my problem: > > LIGO is directly on the surface of planet Earth and Andromeda a few > million light-years away. > > This distance squared gives a fantastically large number, hence the > effect of gravity caused by remote galaxies should be incredibly small. > > And this makes me wonder, what actually the LIGO experiment tries to > measure. > > > TH somewhere there is a calculation and they are trying to measure the lenght of 1/5 of a proton at some frequency 100 hz? another problem is that the gravity wave effects what is measured the same as the measuring device....
[toc] | [prev] | [next] | [standalone]
| From | John Heath <heathjohn2@gmail.com> |
|---|---|
| Date | 2015-10-04 16:07 -0700 |
| Message-ID | <0ae7067a-cd9c-410d-b27d-d71e1f782047@googlegroups.com> |
| In reply to | #366170 |
On Sunday, October 4, 2015 at 5:39:33 PM UTC-4, gilber34 wrote: > On 10/4/2015 3:32 PM, Thomas Heger wrote: > > Am 04.10.2015 19:07, schrieb Kent Beeler: > >> Thomas Heger wrote: > >> > > >>> The LIGO experiment is based on a certain idea about how gravity > >>> actually functions, which I think is wrong. > >> > > > > We know, that gravity makes thing drop and follows an inverse square law > > (diminishes with distance squared). > > > > > > Now my problem: > > > > LIGO is directly on the surface of planet Earth and Andromeda a few > > million light-years away. > > > > This distance squared gives a fantastically large number, hence the > > effect of gravity caused by remote galaxies should be incredibly small. > > > > And this makes me wonder, what actually the LIGO experiment tries to > > measure. > > > > > > TH > > > somewhere there is a calculation and they are trying to measure the > lenght of 1/5 of a proton at some frequency 100 hz? > > another problem is that the gravity wave effects what is measured the > same as the measuring device.... Good point. One can not measure a change in gravity if you and the test equipment are in that same change of gravity. At the speed of light a gravity wave detector with ends 160,000 meters , 100 miles , apart is out of phase with a gravity wave of 3,000 Hz . Between here and the moon would be 1 cycle per second gravity wave. This is still too high in frequency for most planetary gravity waves. At best LIGO can only detect a gravity shock wave with high frequency harmonics with a sharp leading edge of the gravity wave front such as a gamma burst from an exploding star.
[toc] | [prev] | [next] | [standalone]
| From | shuba <tim@sh.uba> |
|---|---|
| Date | 2015-10-05 05:33 +0000 |
| Message-ID | <mut22l$5li$1@speranza.aioe.org> |
| In reply to | #366176 |
John Heath wrote:
> One can not measure a change in gravity if you and the test
> equipment are in that same change of gravity. At the speed of
> light a gravity wave detector with ends 160,000 meters , 100
> miles , apart is out of phase with a gravity wave of 3,000 Hz .
> Between here and the moon would be 1 cycle per second gravity
> wave. This is still too high in frequency for most planetary
> gravity waves. At best LIGO can only detect a gravity shock wave
> with high frequency harmonics with a sharp leading edge of the
> gravity wave front such as a gamma burst from an exploding star.
Cranks are funny.
---Tim Shuba---
[toc] | [prev] | [next] | [standalone]
| From | John Heath <heathjohn2@gmail.com> |
|---|---|
| Date | 2015-10-04 23:44 -0700 |
| Message-ID | <2172e370-bc5d-40bf-9244-9f97e242cdf0@googlegroups.com> |
| In reply to | #366193 |
On Monday, October 5, 2015 at 1:33:12 AM UTC-4, shuba wrote: > John Heath wrote: > > > One can not measure a change in gravity if you and the test > > equipment are in that same change of gravity. At the speed of > > light a gravity wave detector with ends 160,000 meters , 100 > > miles , apart is out of phase with a gravity wave of 3,000 Hz . > > Between here and the moon would be 1 cycle per second gravity > > wave. This is still too high in frequency for most planetary > > gravity waves. At best LIGO can only detect a gravity shock wave > > with high frequency harmonics with a sharp leading edge of the > > gravity wave front such as a gamma burst from an exploding star. > > Cranks are funny. > > > ---Tim Shuba--- Its the useless troll Shuba coming back for more punishment. You must have a fetish for this. And as usual there is no physics on the table as we do not want to go there do we. What I said is a result of general relativity not speculation. I can only conclude from this you also think Dr Einstein is a crank.
[toc] | [prev] | [next] | [standalone]
| From | shuba <tim@sh.uba> |
|---|---|
| Date | 2015-10-05 08:02 +0000 |
| Message-ID | <mutapu$nkb$1@speranza.aioe.org> |
| In reply to | #366196 |
John Heath wrote:
> Its the useless troll Shuba coming back for more punishment. You
> must have a fetish for this. And as usual there is no physics on
> the table as we do not want to go there do we.
Absolutely I'm not going there with any of you silly cranks. Since
this thread started, I've perused several decent websites and
watched a couple popular videos online which explain the current
situation about the implementation of the "advanced" LIGO. I've
also briefly reviewed the relevant parts of a book on my shelf, "A
first course in general relativity" by Schutz, which is admittedly
rather old (1985) and predates LIGO, but does go into some of the
mathematics of gravitational waves. It's an interesting subject.
I've no idea why you think it might be in my interest to treat
braying jackasses as people with which to even attempt anything
close to a having a serious debate or collaboration. I'm quite
happy to point out some idiocy every now and then and leave it at
that. Is it trolling? Sure, YHBT, thanks for reading and replying.
Nevertheless, the "truth" really is "out there", just not often to
be found in this goofy newsgroup. Just as with über-crank Thomas
Heger, you could take the initiative to seriously learn about the
subject instead of bashing the thousands of theoretical and
experimental physicists who've worked at LIGO and elsewhere by
posting inane and incorrect gibberish, insinuating that these
professionals don't know what they are doing.
> What I said is a result of general relativity
Not even close. That you might even possibly think so is a great
example of why I say that cranks are funny. You have *no* clue.
---Tim Shuba---
[toc] | [prev] | [next] | [standalone]
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Date | 2015-10-05 21:44 +0200 |
| Message-ID | <d7g28nFeravU1@mid.individual.net> |
| In reply to | #366200 |
Am 05.10.2015 10:02, schrieb shuba: > John Heath wrote: > >> Its the useless troll Shuba coming back for more punishment. You >> must have a fetish for this. And as usual there is no physics on >> the table as we do not want to go there do we. > > Absolutely I'm not going there with any of you silly cranks. Since > this thread started, I've perused several decent websites and > watched a couple popular videos online which explain the current > situation about the implementation of the "advanced" LIGO. I've > also briefly reviewed the relevant parts of a book on my shelf, "A > first course in general relativity" by Schutz, which is admittedly > rather old (1985) and predates LIGO, but does go into some of the > mathematics of gravitational waves. It's an interesting subject. > > I've no idea why you think it might be in my interest to treat > braying jackasses as people with which to even attempt anything > close to a having a serious debate or collaboration. I'm quite > happy to point out some idiocy every now and then and leave it at > that. Is it trolling? Sure, YHBT, thanks for reading and replying. > > Nevertheless, the "truth" really is "out there", just not often to > be found in this goofy newsgroup. Just as with über-crank Thomas > Heger, you could take the initiative to seriously learn about the > subject instead of bashing the thousands of theoretical and > experimental physicists who've worked at LIGO and elsewhere by > posting inane and incorrect gibberish, insinuating that these > professionals don't know what they are doing. > I actually think, that 'Growing Earth' is true. I tried to prove this idea and found several hints. And I started some threads about this subject and participated in a lot of others. The result was always identical: some people (like you for example) call me 'crank' or get aggressive in some way. I asked the question (about LIGO), how gravity of remote galaxies (or waves within) could be measured on Earth. The problem is the inverse square law. I actually have made a mistake, since Earth radius should be used as distance unit (not meters). But 2.5 million light-years to the closest large galaxy is a lot, even in units of Earth' radius. Now you have to square this and divide the strength of the gravity wave by that number. Than you get a tiny, tiny force. And this would add to other forces, we have here on planet Earth, and get what a detector could eventually measure. But we have also 'noise'. And among the sources of such 'noise' is (in my opinion) the reason, why Earth would grow - and growth itself. Since 'Growing Earth' would violate a certain assumption on what the LIGO experiment is based (constant mass of the Earth and constant gravitational field) I am predominantly sceptic. TH
[toc] | [prev] | [next] | [standalone]
Page 1 of 9 [1] 2 3 4 5 6 7 8 9 Next page →
Back to top | Article view | sci.physics.relativity
csiph-web