Please create an account to participate in the Slashdot moderation system


Forgot your password?

Comment Re:Giant Space Ocean? (Score 2) 183

It can't be moving away from us at more than twice the speed of light. Even if we were moving at just ander the speed of light in one direction and it is moving at just under the speed of light in the opposite direction, thats still just under twice the speed of light.

IANAPhysicist, but the object itself is not moving FTL with respect to the space around it, but the space itself is expanding. Here is some reading the corroborates this. "While special relativity constrains objects in the universe from moving faster than the speed of light with respect to each other, there is no such theoretical constraint when space itself is expanding. It is thus possible for two very distant objects to be moving away from each other at a speed greater than the speed of light (meaning that one cannot be observed from the other). The size of the observable universe could thus be smaller than the entire universe."

Comment Re:Giant Space Ocean? (Score 1) 183

Now, imagine life evolved there...

...And due to the time dilation effects of intense gravity wells, we can simply travel to the black-hole, extract their quantum holographic imprint that still exists at the event horizon, and study them (in roughly one more Universe worth of time, providing it takes us about one billion years to create Light-Speed travel.)

Even light speed travel probably wouldn't help get you there. It is already moving away from us at more than twice the speed of light (moving at 275922km/s) due to universe expansion.

Comment Probably not as simple as that... (Score 2) 183

12 billion light years away means 12 billion years ago. That water will be scattered asunder by now.

I wonder if a cosmologist could check the validity of that statement because it seems to neglect universe expansion. Looking online at APM 08279+5255, its redshift is 3.911. Plugging that into wolframalpha indicates the the lookback time is 12bn years, but that the "actual" distance at this time is nearly 23.7bn lightyears. Redshift: Wolfram:**LookbackTimeFromRedshift--

Slashdot Top Deals

It is much easier to suggest solutions when you know nothing about the problem.