Re: If time slows down when you travel at high speeds, then couldn’t you travel across the galaxy within your lifetime by just accelerating continuously?

From	gilber34 <invalid@invalid.com>
Newsgroups	sci.physics
Subject	Re: If time slows down when you travel at high speeds, then couldn’t you travel across the galaxy within your lifetime by just accelerating continuously?
Date	2015-09-15 10:48 -0500
Organization	Aioe.org NNTP Server
Message-ID	<mt9ejo$8ct$2@speranza.aioe.org> (permalink)
References	<rtydnYXx1Jmmg2XInZ2dnUU7-fednZ2d@giganews.com>

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On 9/15/2015 8:33 AM, Sam Wormley wrote:
> If time slows down when you travel at high speeds, then couldn’t you
> travel across the galaxy within your lifetime by just accelerating

>> Physicist: Yup!  But sadly, this will never happen.
>>
>> This is a good news / really bad news situation.  On the one hand, it
>> is true (for all intents and purposes) that if you travel fast
>> enough, time will slow down and you’ll get to your destination is
>> surprisingly little time.  The far side of the galaxy is about
>> 100,000 lightyears away, so it will always take at least 100,000
>> years to get there.  However, the on-board clocks run slower (from
>> the perspective of anyone “sitting still” in the galaxy) so the ship
>> and everything on it may experience far less than 100,000 years.
>>
>> First, when you read about traveling to far-off stars you’ll often
>> hear about “constant acceleration drives”, which are rockets capable
>> of accelerating at a comfortable 1g for years at a time (“1g” means
>> that people on the rocket would feel an acceleration equivalent to
>> the force of Earth’s gravity).  However!  Leaving a rocket on until
>> it’s moving near the speed of light is totally infeasible.



because of the amount of MASS that has to be expended, that is your real 
limit, calculate it for extra points.



<snip rest>

Thread

If time slows down when you travel at high speeds, then couldn’t you travel across the galaxy within your lifetime by just accelerating continuously? Sam Wormley <swormley1@gmail.com> - 2015-09-15 08:33 -0500
  Re: If time slows down when you travel at high speeds, then couldn’t you travel across the galaxy within your lifetime by just accelerating continuously? gilber34 <invalid@invalid.com> - 2015-09-15 10:48 -0500
  Re: If time slows down when you travel at high speeds, then couldn’t you travel across the galaxy within your lifetime by just accelerating continuously? jimp@specsol.spam.sux.com - 2015-09-15 17:48 +0000
  Re: If time slows down when you travel at high speeds, then couldn't you travel across the galaxy within your lifetime by just accelerating continuously? "nuny@bid.nes" <Alien8752@gmail.com> - 2015-09-15 15:05 -0700
    Re: If time slows down when you travel at high speeds, then couldn't you travel across the galaxy within your lifetime by just accelerating continuously? Sam Wormley <swormley1@gmail.com> - 2015-09-15 19:11 -0500
      Re: If time slows down when you travel at high speeds, then couldn't you travel across the galaxy within your lifetime by just accelerating continuously? "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-09-16 12:50 -0700
  Re: If time slows down when you travel at high speeds, then couldn't you travel across the galaxy within your lifetime by just accelerating continuously? "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-09-15 15:37 -0700

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