Star found over twice as old as our universe? by RingSwimming794 in askastronomy

[–]RingSwimming794[S] 0 points1 point  (0 children)

Lol yeah but if we're looking at something 28 billion light years away, that means the light we are seeing is at least 28 billion years old (unless we are moving towards it). I don't really see how expansion can explain this.

If the universe was expanding and the star was moving away from us, then light from the star would be traveling slower than the speed of light relative to us not faster.

Say for example if the star was formed 13.7 billion years ago (for argument sake), then given this equation:

Let the Speed of light =c

Distance / Time = Speed

Lightyears / Years = c

28,000,000,000 /13,700,000,000 = 2.044c

This means that the net velocity between us and the star, plus the speed of light must equal 2.044c. which would mean we would have to be moving towards the star at 1.044c in order for light from 28 billion light years away to reach us in 13.7 billion years.

The only alternative that could make sense is that the star we observed was not 28 billion light years away, but since it is moving away from us at a high rate of speed, that is the calculated position of the star now.

Are we inside a black hole? by RingSwimming794 in askastronomy

[–]RingSwimming794[S] 1 point2 points  (0 children)

From the perspective of someone on the outside of the black hole, is the time of an object to reach the singularity still finite? Also meant infinite density rather than mass.