Does the Universe have a "day"?

来源: Calypso 于 2015-09-25 11:39:28 [] [旧帖] [给我悄悄话] 阅读数 : (199 bytes)

A day is the time for the earth to go around the sun. I don't know what you mean a "universe day"? an era? Don't use day then, use some other terms. Don't confuse me.

所有跟帖： 

• 天上一天，地下一年，是形容在不同参照系里，测量的结果不是一样的。 -蓝山雀- ♀ 给 蓝山雀 发送悄悄话 蓝山雀 的博客首页 (47 bytes) () 09/25/2015 postreply 12:08:22

• "天上一天，地下一年", why not two years? -Calypso- ♂ 给 Calypso 发送悄悄话 (306 bytes) () 09/25/2015 postreply 12:16:28

• Are you telling me that -Calypso- ♂ 给 Calypso 发送悄悄话 (100 bytes) () 09/25/2015 postreply 12:32:21

• 天上一天，地下一年，是西游记里的 -Calypso- ♂ 给 Calypso 发送悄悄话 (50 bytes) () 09/25/2015 postreply 14:07:36

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