LLH 發表於 2007-9-10 21:19:15

理論天文組討論題目2

Harrison – Cosmology, Chapter 14, Project 4

Explain why, in a universe 1 year old, we cannot see farther than a distance of approximately 1 light year.

[ 本帖最後由 LLH 於 2007-9-12 00:23 編輯 ]
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