你是以地球作為參照係的吧。
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No, not me, you use 地球作為參照係
-Calypso-
♂
(117 bytes)
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09/25/2015 postreply
11:36:33
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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-
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(230 bytes)
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09/25/2015 postreply
11:54:46
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You are avoiding my question.
-Calypso-
♂
(327 bytes)
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09/25/2015 postreply
12:01:51
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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)
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09/25/2015 postreply
12:05:10
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I am asking you the definition of a day. Not 光年
-Calypso-
♂
(47 bytes)
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09/25/2015 postreply
12:07:26
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光年是距離,你問的是時間,這是跑題了。
-藍山雀-
♀
(7517 bytes)
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09/26/2015 postreply
00:54:59
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How does 460億光年 related to 7 days?
-Calypso-
♂
(31 bytes)
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09/25/2015 postreply
12:05:21
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Does the Universe have a "day"?
-Calypso-
♂
(199 bytes)
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09/25/2015 postreply
11:39:28
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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)
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09/25/2015 postreply
12:08:22
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"天上一天,地下一年", why not two years?
-Calypso-
♂
(306 bytes)
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09/25/2015 postreply
12:16:28
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Are you telling me that
-Calypso-
♂
(100 bytes)
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09/25/2015 postreply
12:32:21
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天上一天,地下一年,是西遊記裏的
-Calypso-
♂
(50 bytes)
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09/25/2015 postreply
14:07:36
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