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Groups > sci.physics > #571544
| From | Sergio <invalid@invalid.com> |
|---|---|
| Newsgroups | sci.physics |
| Subject | Re: The Distant Revolving Astronaut: When Time Runs Backwards |
| Date | 2016-04-19 08:56 -0500 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <nf5dh2$mbk$1@gioia.aioe.org> (permalink) |
| References | <geednSQmUNAv0ojKnZ2dnUU7-T2dnZ2d@giganews.com> |
On 4/18/2016 4:20 PM, Sam Wormley wrote: > The Distant Revolving Astronaut: When Time Runs Backwards >> http://physicsinsights.org/revolving_astronaut.html > > > >> Imagine a spaceship in orbit around a distant planet. Imagine that >> the Earth lies in the plane of the orbit. >> >> At one point in the orbit, the ship will be traveling directly toward >> the Earth. At that moment, in the momentarily comoving reference >> frame of the ship, the Earth lies far ahead of the ship. Since the >> ship is moving toward Earth, that means that time on the Earth must >> appear far ahead of "local" time on the planet below. Looking at the >> Lorentz transform, if ship's time is zero, and velocity is positive, >> then Earth's velocity relative to the spaceship is negative, and >> current time on Earth will be given by v*gamma*distance. Again, the >> clocks on Earth seem to the astronauts to be set far in the future. >> >> At another point in the orbit, the ship will be traveling directly >> away from the Earth. The sign on the velocity flips, and now it >> seems to the astronauts that clocks on Earth are set far in the past, >> as the Earth time is now given by -v*gamma*distance. > wrong. math is wrong too all you are talking about is relitive motion, and that does not translate to Wormley's title of the post.
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The Distant Revolving Astronaut: When Time Runs Backwards Sam Wormley <swormley1@gmail.com> - 2016-04-18 16:20 -0500
Re: The Distant Revolving Astronaut: When Time Runs Backwards jimp@specsol.spam.sux.com - 2016-04-18 21:46 +0000
Re: The Distant Revolving Astronaut: When Time Runs Backwards Sergio <invalid@invalid.com> - 2016-04-19 08:56 -0500
Re: The Distant Revolving Astronaut: When Time Runs Backwards HVAC <mr.hvac@gmail.com> - 2016-04-19 07:13 -0700
Re: The Distant Revolving Astronaut: When Time Runs Backwards benj <nobodyxx@gmail> - 2016-04-19 13:44 -0400
Re: The Distant Revolving Astronaut: When Time Runs Backwards HVAC <mr.hvac@gmail.com> - 2016-04-19 11:00 -0700
Re: The Distant Revolving Astronaut: When Time Runs Backwards benj <nobodyxx@gmail> - 2016-04-19 23:05 -0400
Re: The Distant Revolving Astronaut: When Time Runs Backwards HVAC <mr.hvac@gmail.com> - 2016-04-20 04:04 -0700
Re: The Distant Revolving Astronaut: When Time Runs Backwards benj <nobodyxx@gmail> - 2016-04-20 13:18 -0400
Re: The Distant Revolving Astronaut: When Time Runs Backwards "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-04-19 09:37 -0700
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