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Heyoka wrote:QUOTE (Heyoka @ Feb 27 2012, 07:12 AM) 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!

The exact same principle of putting a carrot tied on a stick in front of a donkey to create a perpetual motion machine.

Genius!

HSharp wrote:QUOTE (HSharp @ Feb 27 2012, 01:10 PM) The exact same principle of putting a carrot tied on a stick in front of a donkey to create a perpetual motion machine.

Genius!

It's the Baron von Münchhausen solution. When he fell into a swamp, he just grabbed his own hair and pulled himself up.

I prefer The Conservative Paradigm: Why don't poor people stop mooching off of us and just pull themselves up by their own bootstraps.

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?

The effects of gravity propogate at the speed of light as well.

Think about it this way: gravity is really just distortion of spacetime due to the mass of objects. Objects with mass can't go faster than c anyways, so even IF gravity could propogate faster than c, we'd never know since you can't get the source of a gravitational effect to move faster than c.

please discuss more this is so intresting *-*