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Posted: Thu Feb 23, 2012 11:46 pm
by Sundance_
I have a question that belongs in this thread, methinks.
How fast is gravity? Or at least the effects of gravity?
Say our galaxy eats a smaller galaxy. Does the gravity from the smaller galaxy affect us instantly, and we just can't see what happened until the light reaches us?
Posted: Fri Feb 24, 2012 4:15 am
by Adaven
Sundance_ wrote:QUOTE (Sundance_ @ Feb 23 2012, 06:46 PM) I have a question that belongs in this thread, methinks.
How fast is gravity? Or at least the effects of gravity?
Say our galaxy eats a smaller galaxy. Does the gravity from the smaller galaxy affect us instantly, and we just can't see what happened until the light reaches us?
I believe the effects of gravity propagate at the speed of light as well. So if the moon suffered a
Spontaneous Massive Existence Failure, the tidal waves wouldn't start for a few seconds.
Posted: Fri Feb 24, 2012 4:22 am
by Duckwarrior
Posted: Fri Feb 24, 2012 4:38 am
by Camaro
I thought Scientists raised the speed of light in 2208?
Posted: Sat Feb 25, 2012 1:08 am
by lexaal
Camaro wrote:QUOTE (Camaro @ Feb 24 2012, 05:38 AM) I thought Scientists raised the speed of light in 2208?
The manager said improve speed by 20% and reduce price/energy to 95%.
Posted: Sat Feb 25, 2012 5:22 am
by BackTrak
Camaro wrote:QUOTE (Camaro @ Feb 23 2012, 10:38 PM) I thought Scientists raised the speed of light in 2208?
Raised it from a baby, all by hisself...
Posted: Mon Feb 27, 2012 5:25 am
by beauty
There is a cool article in Discover magazine in which they talk about the fact that Einstein didn't quite go far enough in relativity.
Discover, as usual, skips the mathematical bit, but the gist is that if you truly make all measurements relative some of the 'weirdness' that we see under Einstein goes away.
The article does not go into what, if any, cool thing the ''pure' relativity theory would provide.
One of the coolest parts of his theory is that time is not an absolute, but is somehow emergent from relationships in space.
Prior (2000) Discover article.
Posted: Mon Feb 27, 2012 6:36 am
by Mastametz
Sundance_ wrote:QUOTE (Sundance_ @ Feb 23 2012, 03:46 PM) How fast is gravity? Or at least the effects of gravity?
I knew this when I was taking physics like 6 years ago....
Gravity causes things to accelerate at like 9.8mps?
or something
i don't know
Posted: Mon Feb 27, 2012 7:12 am
by Heyoka
Think space ships should run on Gravity.
Like some gravity well that you can form, that remains a certain distance in front of you at all times. Just attach it to a ship and you have a source of infinite acceleration!
Posted: Mon Feb 27, 2012 7:35 am
by Mastametz
easy, soon as we start making black holes