Quote:
Originally Posted by
trcvrs 
Quote:
Originally Posted by
lordikon 
10 billion light years away at the time that light was emitted, based on the observation that almost all galaxies are moving away from each other, it's probably much further away than that now. As you travelled towards it at the speed of light, it would still appear to not be getting closer to you at the speed of light, the result being that after 10 billion years of light speed travel it would still be quite far away from you.
It's insane to think about it, but the Voyager satellite, sent out in the late 70's, and has been travelling multiple times faster than a bullet from a gun, for 30+ years, has only travelled about 16 light hours. Now imagine what a light day, month, or year is. And now imagine what 10 billion light years are.
The scale of space is absolutely insane. Here's something to blow your mind. If the visible universe were the size of Earth, then our solar system would be the size of a dust particle, and Earth would be 1/180th the size of a single atom.
Actually, wrong.
If you traveled towards something at the speed of light*, time dilation would mean that the object you're travelling towards would appear frozen in time. *Note that you can't actually travel at the speed of light, only asymptotically approach the speed of light, and the faster you travel, the more things around you slow down.
So you could fly all the way into the that galaxy and it would still appear at the same distance as when you left Earth? I realize time slows down around you as you travel faster, I'm just not sure what this would look like if you were looking at something that you were traveling at.
Almost completely unrelated:
If two particles are going in opposite directions at the speed of light, when they hit each other, is it like hitting something at twice the speed of light (which isn't possible)? In a much slower example, two cars travelling at 50mph hit each other head on, it's the same effect as a car going 100mph hitting a stationary car head on. So does this work at speeds like the speed of light as well?
Quote:
Originally Posted by
Paradigm84 
Quote:
Originally Posted by
trcvrs 
Actually, wrong.
If you traveled towards something at the speed of light*, time dilation would mean that the object you're travelling towards would appear frozen in time. *Note that you can't actually travel at the speed of light, only asymptotically approach the speed of light, and the faster you travel,
the more things around you slow down.
Yeah, that's how going faster than something else works....
Joking

But yeah, you'd never get to the speed of light as your mass increases exponentially as your speed tends to C.
These were hypotheticals, I realize something with mass cannot travel the speed of light.
Edited by lordikon - 8/29/12 at 5:04pm