作者查詢 / Atropos0723
作者 Atropos0723 在 PTT [ sky ] 看板的留言(推文), 共179則
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13F推: 因為黃道與白道夾角5度,滿月時月亮在太陽的相反方向04/30 07:57
14F→: 例如冬至時太陽直射南迴歸線,代表滿月時月亮會出現04/30 07:58
15F→: 赤緯18.5~28.5度的範圍內,也就是北天球,對位於北迴04/30 08:00
16F→: 歸線的台灣而言,是有一點機會向北方看到滿月。04/30 08:00
15F推:只要是同一個公轉系統都只算成是一個行星.....03/04 23:19
16F推:很難想像互繞共同質心的兩星可以算是兩個行星03/04 23:22
17F→:其實是有可能一個軌道兩個行星,互相在L3的位置03/04 23:23
18F推:不過L3是不穩定的解就是了.....03/04 23:25
2F推:恆星可視為點光源,行星則為面光源。01/25 19:15
1F推:第二題基本上就是克卜勒第三定律06/28 18:56
1F推:剛聽完第一場,看得出來講者很想照顧台下的小朋友03/17 17:19
2F→:都不太願意使用比較簡潔的術語。03/17 17:20
3F→:內容大概就是介紹隕石分類與太陽星雲學說03/17 17:20
4F→:講得很慢,大概是為了顧及小朋友吧。不過我看小朋友都03/17 17:22
5F→:不太領情,好幾隻都在玩....Orz03/17 17:22
2F推:天文觀測史以來?02/04 00:57
4F推:為何只要是涉及地外生命的研究 都會被冠上陰謀論呢...12/04 12:23
3F→:在沒有特別聲明的情況下,一般討論宇宙就是指可觀測11/20 23:14
4F→:宇宙,至於實際宇宙的大小,有宇宙學者曾經估計過,11/20 23:15
5F→:是可觀測宇宙的250倍← 這就真的不知從何而來11/20 23:16
6F→:而且137億光年都已經比可觀測宇宙來的小了,自然不會11/20 23:17
7F→:是實際的宇宙大小。11/20 23:17
7F推:簡單來說,就是人眼在接收以綠光為最大強度之黑體輻射10/23 22:56
8F→:時,會產生白色的感覺,這跟物理無關,而是跟視網膜的10/23 22:57
9F→:錐狀細胞的生理學有關。10/23 22:57
12F推:球狀星團的恆星年齡都很老,屬於第二族星,這顯示恆星10/23 23:01
13F→:的質量大小均很小,也就是發光能力都小的差不多10/23 23:01
14F→:如果是疏散星團,那就很有可能是龍蛇雜處,大質量與10/23 23:02
15F→:小質量的恆星都在同一個星團內,屬於第一族星,星團的10/23 23:03
16F→:年齡很年輕,這時不同恆星的發光能力就會有很大的差異10/23 23:03
4F推:日食是由西向東 月食是由東向西09/21 19:58