Harrison – Cosmology, Chapter 14, Project 6
Explain the difference between recession velocity and ordinary or peculiar velocity, and comment on the following remark taken from a textbook in astronomy: "There are mathematical models of the universe that have galaxies ... going even faster than the velocity of light. Of course, the laws of relativity forbid this, and such models are only of academic interest."
[ 本帖最後由 LLH 於 2007-9-12 00:25 編輯 ] |
發表於 2007-9-10 21:20:50