- #1
User11037
- 8
- 0
It is often quoted that, when we see stars from Earth through, for example, a telescope, we are not seeing them as they are now, but how they were millions of years ago (because the travel of light is not instantaneous).
However, say if I take a picture of a star from Earth, then jump into a spaceship and travel at 0.999999... of the speed of light towards the star (assume my acceleration is virtually instantaneous). If the star is say, 4,000,000 light years away, when I see the star, will it appear just after as in my photo, or approximately 4,000,000 years older than it does in my photo, or something else?
However, say if I take a picture of a star from Earth, then jump into a spaceship and travel at 0.999999... of the speed of light towards the star (assume my acceleration is virtually instantaneous). If the star is say, 4,000,000 light years away, when I see the star, will it appear just after as in my photo, or approximately 4,000,000 years older than it does in my photo, or something else?