Jabberwocky   45 #1 Posted February 26, 2012 Ok, sounds like a daft question but everything in the cosmos has a velocity, yes? The speed of sound, light etc., but gravity...?  If a black hole was to pop into existence a million miles away from us, exactly how long would it take before we started to be sucked into it? I know its not likely to happen, but try to imagine...  And, they also say that everything in the cosmos that has gravity, has a slight effect on everything else, Saturn has a slight effect on Earth, the Earth has a slight effect on Uranus (snigger) and Uranus has a slight effect on the planet Cousbane thats in the small galaxy thats a little bit to the left of Mars.  If thats the case, then the Andromeda galaxy, which is 2.2 million light years away has an effect on our galaxy, we know this to be true because its going to hit us in a few billion years time, both galaxys will collide.  The gravity that we`re experiencing from that, then... is it the gravity from now?..Or from 2.2 million years ago...?  Anyone have any ideas? I know that this question would have been answered within minutes back in Ye gooooood olllllde dayyyyys of the forum, lets see if any of us have the capacity of the old uns! Share this post Link to post Share on other sites Share this content via...
Chris_Sleeps   10 #2 Posted February 26, 2012 I'm no physicist, but I think different masses have different strengths of gravity.  We'll wait for a proper answer though. Share this post Link to post Share on other sites Share this content via...
Jabberwocky   45 #3 Posted February 26, 2012 They do, the greater the mass, the greater the gravitational force. How long would it take to travel though? Would the gravity of a sugar cube travel slower than the gravity of a car...? Share this post Link to post Share on other sites Share this content via...
Chris_Sleeps   10 #4 Posted February 26, 2012 How long would it take to travel though? Would the gravity of a sugar cube travel slower than the gravity of a car...? I wouldn't say gravity travels, per se. It's a force that is exherted on other matter. If you dropped an egg on earth it would travel at a different speed compared to doing the same on the moon.  Two posts and I'm exhausting my knowledge of physics. Share this post Link to post Share on other sites Share this content via...
Deltic   10 #5 Posted February 26, 2012 Try this  Speed of light if you can't be bothered. Share this post Link to post Share on other sites Share this content via...
Jabberwocky   45 #6 Posted February 26, 2012 Its not easy is it? The force though has to have a sort of set speed, the gravitational force from the sun, which is about 8 light minutes from us... is that force from the sun as it is now or from 8 minutes ago...?  I know we dont understand the nature of gravity as much as we`d like to, but... I wonder if there are any theorys at least about that...? Share this post Link to post Share on other sites Share this content via...
Jabberwocky   45 #7 Posted February 26, 2012 Try this  Speed of light if you can't be bothered.  Id rather not if you dont mind...? I prefer to hear peoples opinions on the matter. Google is too easy. If I wanted to google it I would have, just as I google other things such as coughporn Share this post Link to post Share on other sites Share this content via...
owlshihgreen   11 #8 Posted February 26, 2012 as a force can gravity have a 'speed'? Because it acts on everything does it cause acceleration on those objects it attracts       .......................thats it my brian hurts now Share this post Link to post Share on other sites Share this content via...
Jabberwocky   45 #9 Posted February 26, 2012 So gravity travels at the speed of light? We`re feeling the effects of the Andromeda Galaxy as it was 2 million years ago...? Share this post Link to post Share on other sites Share this content via...
Balpin   12 #10 Posted February 26, 2012 I think its a bit like magnetism, it is just there. I know what you mean, as light takes time to travel, does gravity. Thats a good one, Jabberwocky, and from what I see, only one you could think up. Share this post Link to post Share on other sites Share this content via...
Jabberwocky   45 #11 Posted February 26, 2012 as a force can gravity have a 'speed'? Because it acts on everything does it cause acceleration on those objects it attracts      .......................thats it my brian hurts now   but gravity itself.... does that have a speed...? Ok the speed of light has been mentioned. Share this post Link to post Share on other sites Share this content via...
Jabberwocky   45 #12 Posted February 26, 2012 I think its a bit like magnetism, it is just there. I know what you mean, as light takes time to travel, does gravity. Thats a good one, Jabberwocky, and from what I see, only one you could think up.  I was in the bath when I thought it up, it was my "Eureka" moment, or in my case, my "Bleedin `ell thats a good un!" moment! Share this post Link to post Share on other sites Share this content via...