Recent content by arthur0

Thx for all the answers. I meant the numbers as I typed them. Vanadium easily shows that my first question is solved easily in a non relativistic setting. I believe now that his reply is also correct in relativistic settings. Unless Matterwave initial counter argument is correct. I now guess it...

First question. Suppose you send a rocket with initial speed of c/10 and no further propulsion or gravity to a distant galaxy moving away due to space expansion at a speed of c/3. Will the rocket reach the galaxy? Temptative answer. If we call f(t) the fraction of the distance covered at time...