什麼是Pre-mainsequencestar? - 命運
By Gilbert
at 2007-04-03T00:00
at 2007-04-03T00:00
Table of Contents
我在wiki百科看到pre-mainsequencestar這詞http://en.wikipedia.org/wiki/Pre-main_sequence_sta...按裡面的說法,好像是說原恆星(protostar)是指星體周圍還存在著未收縮的星塵雲氣(星繭?);而pre-mainsequencestar是指周圍雲氣已經消散,質量也不再增加,但能量來源仍同原恆星為重力位能的轉換。1.不知其定義是不是如此?2.還有
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命運
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By Delia
at 2007-04-04T15:35
at 2007-04-04T15:35
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