冥王星的 Q&A
本文章最後由 mca 於 2015-9-6 00:07 編輯冥王星的 Q&A
What has amazed each of you about the New Horizons data? (3:10)
What could be replenishing Pluto's atmosphere? (5:50)
Could internal heat from Pluto be contributing to its geological changes and if so, what is its source? (10:10)
Why don't we see as many craters on Pluto? (11:25)
What would it be like to ice-skate on Pluto? (13:25)
Could Pluto and its moon Charon have formed at a later date than the rest of the solar system? (15:45)
What will the New Horizons mission be able to tell us about other objects in the outer solar system? (17:30)
How can studying Pluto tell us about the origins of Earth and the inner solar system? (20:55)
Since Pluto is so seasonal is it possible that the Tombaugh Regio region would ever disappear? (22:15)
What data about Pluto are you eagerly awaiting? (26:40)
Just how different is Pluto's geology from earth? (28:50)
答案在這網址的短片中
http://www.skyandtelescope.com/a ... 81010&rid=246425201
冥王星慨說
---------------
從美國新視野號探測器 (http://pluto.jhuapl.edu/ ) 在今年 7 月掠過冥王星時所見,冥王星被冰態的氮、甲烷和一氧化碳覆蓋,陽光把氮電離形成極稀薄的氮離子大氣層。表面有一個廣寬的心形冰封平原 (下圖),已命名為 Tombaugh Rigio,平原上沒有碰撞坑,但有冰川流動的痕跡,這意味着冥王星仍然有地質活動,估計心形平原形成不超過 1 億年,相對 46 億年的地球年齡算是十分年輕了。近赤道處有三千多米高的結冰山脈,體內可能有一層水冰,再下一層是岩石,整體的平均密度約 2 g / cc。
http://forum.hkas.org.hk/Web/Pluto_NewHorizons_s.jpg
頁:
[1]