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作者 ccc73123 在 PTT [ sky ] 看板的留言(推文), 共1469則
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收起看板(590)
4F推: DISCOVERY怎麼會跟這種講幹話的節目合作...?06/26 18:56
4F推: 如果要能直接觀察系外行星表面 不知道要多強大的望遠鏡?06/22 15:27
6F→: 稍微算了一下 以現有的科技來看 要能分辨10光年外100km06/22 20:42
7F→: 大小的物體 口徑大概要100萬公里XD06/22 20:42
9F推: 我算錯了 可見光望遠鏡的口徑大概要500公里06/22 23:18
10F→: 地球上沒辦法做到 但如果蓋在太空中就有可能06/22 23:19
6F推: 入軌失敗的話不會變太空垃圾 會變隕石06/20 21:14
2F推: 這好像是人類第一次觀測到黑洞形成06/13 01:52
8F推: 質量太大的話反而有可能會直接塌縮 不一定會爆炸06/15 23:37
7F推: 這次的研究重點應該是在太陽以外的恆星首次觀測到吧06/11 01:12
1F推: 如果是被非自然造物擋住 那應該不會變亮才對06/08 22:53
13F推: 某方面來說 火星的條件應該比真空狀態更嚴苛05/19 23:43
4F推: 外星人有可能像人啊 至少會是像人一樣的直立生物05/13 22:34
5F→: 用腳走路把手空出來才能做出各種有創造力的事情05/13 22:34
6F→: 還有一個觀點是趨同演化 可能會演化出和人類類似的構造05/13 22:35
7F→: 才有辦法發展出文明 思考中樞要有一定的分量05/13 22:36
8F→: 有靈巧的附肢和敏銳的感官能和環境互動製造工具05/13 22:37
9F→: 當然如果文明程度低甚至無文明 型態可能會更多樣化05/13 22:39
16F推: 樓上電影看太多05/15 18:21
29F推: 我倒是認為適居星球隨便都有 銀河有數千億顆恆星05/17 01:46
30F→: 其中紅矮星占了大多數 要找到適居星球對有穿越宇宙能力05/17 01:51
31F→: 的文明應該是輕而易舉05/17 01:51
36F推: 其實紅矮星才是最適合文明發展的 因為可以穩定存在數百05/17 23:08
37F→: 億年 不要自我毀滅的話 文明可以一直延續下去05/17 23:09
38F→: 像太陽再過個10億年左右 地球就不適合生命生存了05/17 23:10
46F推: 被潮汐鎖定不一定都同一面 也有可能是軌道共振05/18 18:58
47F→: 就算都同一面對恆星 也會有晨昏圈適合液態水存在05/18 18:59
48F→: 我是認為不需要這麼悲觀05/18 18:59
49F→: 另外費米悖論針對的是外星文明 低等生命甚至適居星球05/18 19:01
50F→: 存在的數量應該不會太低05/18 19:02
60F推: 人類都不在意日夜顛倒了 高科技外星人還會在意嗎XD05/21 13:45
68F推: 能源哪會不夠 紅矮星的適居行星距離恆星都不足0.1AU05/21 16:35
69F→: 接收到的輻射照度不會差地球太多05/21 16:36
70F→: 當然如果你指的是能完整利用恆星全部能量的話05/21 16:38
71F→: 的確是比太陽少很多 不過那種文明太遙遠了05/21 16:39
76F推: 要跨越光年的話我想能量來源也不會是母恆星啦05/22 01:02
77F→: 不過我也不認為外星人會想侵略地球05/22 01:03
85F推: 這類比失敗 能跨越宇宙空間的文明 科技的差距可不是像05/23 17:21
86F→: 西班牙人和南美洲的差距05/23 17:22
1F推: 沒有天體05/06 15:04
2F→: 用日心當中心點 地球的對面還是地球軌道啊 哪會有天體?05/06 15:04
5F推: 嚴格說起來L3並不是對蹠點05/06 22:49
6F→: 而且就算L3有天體 如果不夠大的話 從地球也沒辦法觀測到05/06 22:50
2F推: 紅矮星04/21 22:25
4F推: 這顆應該已經潮汐鎖定 晚上那面應該OK啦04/22 21:57