你是以地球作為參照係的吧。
• No, not me, you use 地球作為參照係 -Calypso- ♂ (117 bytes) () 09/25/2015 postreply 11:36:33
• 在已知的可見的宇宙範圍內。而這個範圍,如果用光年表示,就等於460億光年。看裏麵的鏈接。 -藍山雀- ♀ (230 bytes) () 09/25/2015 postreply 11:54:46
• You are avoiding my question. -Calypso- ♂ (327 bytes) () 09/25/2015 postreply 12:01:51
• 光速運行一年的距離,叫光年。光年是距離的單位。 -藍山雀- ♀ (0 bytes) () 09/25/2015 postreply 12:05:10
• I am asking you the definition of a day. Not 光年 -Calypso- ♂ (47 bytes) () 09/25/2015 postreply 12:07:26
• 光年是距離,你問的是時間,這是跑題了。 -藍山雀- ♀ (7517 bytes) () 09/26/2015 postreply 00:54:59
• How does 460億光年 related to 7 days? -Calypso- ♂ (31 bytes) () 09/25/2015 postreply 12:05:21
• Does the Universe have a "day"? -Calypso- ♂ (199 bytes) () 09/25/2015 postreply 11:39:28
• 天上一天,地下一年,是形容在不同參照係裏,測量的結果不是一樣的。 -藍山雀- ♀ (47 bytes) () 09/25/2015 postreply 12:08:22
• "天上一天,地下一年", why not two years? -Calypso- ♂ (306 bytes) () 09/25/2015 postreply 12:16:28
• Are you telling me that -Calypso- ♂ (100 bytes) () 09/25/2015 postreply 12:32:21
• 天上一天,地下一年,是西遊記裏的 -Calypso- ♂ (50 bytes) () 09/25/2015 postreply 14:07:36
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