作者查詢 / Epsilon
作者 Epsilon 在 PTT [ sky ] 看板的留言(推文), 共733則
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3F推:一樓是對的,是角動量守恆,不是轉動慣量,扣掉這一點,原08/12 09:34
4F→:po說的沒錯。08/12 09:34
1F→:那就只是個失焦的星點而已07/29 01:00
1F推:http://adsabs.harvard.edu/abs/2012ApJ...754..131K04/11 22:09
1F推:溫度明顯不對02/21 17:27
14F推:應該是流星,同一時間我們一行人在塔塔加也有看到。02/15 20:30
16F推:沒有。看到再轉相機都來不及了。02/15 23:26
1F推:集光力只跟口徑大小還有鏡片透(反)光率有關,跟光圈大小無02/05 23:20
2F→:關。不要搞混集光力與成像亮度這兩件事。02/05 23:20
5F推:continental US 沒聽過嗎?美國又不是只有本土,還有些幾02/04 18:14
6F→:千公里外的領地與領土。02/04 18:14
8F推:嚴格說來美國本土是mainland US。在中文裡,美國本土確實02/04 20:58
9F→:比美國大陸常出現,在英文中卻是反過來,continental US比02/04 20:58
10F→:mainland US常出現。02/04 20:58
3F推:沒型號的話拍張照片來看看吧。我猜是要改整個對焦筒才有可02/04 10:37
4F→:能對到焦。02/04 10:37
3F推:依您的等級,按其它的需求選相機吧,看你是要拍人拍花拍鳥12/05 23:18
4F→:還是拍什麼,選好相機後,拿來順道拍天文不會有問題的,每12/05 23:18
5F→:一款都很強。12/05 23:18
7F推:標題看成主鏡毀了.....09/24 23:51