作者查詢 / bestbsn
作者 bestbsn 在 PTT [ sky ] 看板的留言(推文), 共37則
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2F推:嗯,看懂了...趕快推07/01 10:03
2F推:雙狹縫干涉的實驗可以去看一下...很有趣10/29 23:06
9F推:參考座標轉換一下就明白了,所有星體都不是靜止的08/01 07:22
10F→:想想看為什麼颱風是螺旋狀的,但星體重力還影響了周圍時空08/01 07:24
11F→:事實上計算起來古典的角動量守恆恐怕還不夠用08/01 07:25
12F→:其中無所不在的暗物質也讓我們搞不清楚空間的形狀08/01 07:26
19F→:暗物質可能在帶動星系的眾恆星有插一腳...但還不清楚08/01 17:08
24F推:引力源不是靜止的,它在宇宙中會一直動,所以物體並不是垂直08/02 02:57
25F→:地落向引力源,而是因引力源改變後會產生提供繞轉的向心力08/02 02:58
26F→:以上是古典力學之一,但相對論更告訴我們,大質量的物體在自08/02 02:59
27F→:轉時會讓周圍時空扭曲,這些並不是無跡可尋的08/02 03:01
28F→:公式L=r X P都告訴你了,P就是線動量08/02 03:02
29F→:r是質點到原點(如重力源)的位移08/02 03:03
30F推:除非v相對於原點在切線方向的速度為0,這才沒有角動量08/02 03:06
31F→:但是事實上,所有的天體在宇宙中都是一直在動的08/02 03:06
2F推:要瞭解天文學,可能還要瞭解一些數學與物理學04/16 12:55
15F→:不要亂猜了...再多看些科普的書吧...錯很多04/16 01:12
14F推:地軸有類似椎動擺的週期,形成歲差,另外又有章動03/12 20:15
4F→:誤導別人的文章...01/07 10:47
9F推:空間擴張的速度...或許可以超越光速10/19 16:54
10F→:但光在空間之中,速度還是定值10/19 16:55
15F→:原po要不要先去瞭解一下狹義相對論啊...05/10 12:30