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Author Topic:   Speed of Light
Agobot
Member (Idle past 4111 days)
Posts: 786
Joined: 12-16-2007


Message 17 of 268 (472848)
06-25-2008 8:38 AM


Dark energy
Why do we have to have Dark Energy to explain the expansion of the universe? If, for whatever reason, 10^-33 seconds after the BB, the universe started to expand very rapidly, what force could stop this expansion? Wouldn't all celestial bodies be moving through space almost indefinitely, unless a force that I can't think of, starts to slow them down(planets are rotating around our sun for this very same reason, right)?

Replies to this message:
 Message 18 by NosyNed, posted 06-25-2008 8:46 AM Agobot has not yet responded
 Message 19 by ramoss, posted 06-25-2008 8:46 AM Agobot has responded
 Message 30 by Taz, posted 06-27-2008 12:28 AM Agobot has not yet responded

  
Agobot
Member (Idle past 4111 days)
Posts: 786
Joined: 12-16-2007


Message 20 of 268 (472851)
06-25-2008 8:56 AM
Reply to: Message 19 by ramoss
06-25-2008 8:46 AM


Re: Dark energy
ramoss writes:

Well, the issue is that the rate at which the universe is expanding is increasing. Also, something that could potentially slow down the expansion of the universe is this little thing known as 'gravity'.

I would think this little thing called gravity would decrease in strength with the ever expanding universe.


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