


彗翎(也稱逆向彗尾或反尾)是從彗星的彗髮投射出來的明顯的尖峰,它似乎朝向太陽,因此在幾何上與另一個彗尾相反:離子尾和塵埃尾。然而,這種現象是從地球上看到的視錯覺。彗翎是由更大的塵埃顆粒組成,它們受太陽輻射壓力的影響較小,並傾向於大致保持在彗星的軌道平面內,最終由於顆粒從彗星表面噴出的速度而沿彗星軌道形成盤狀。當地球穿過彗星的軌道平面時,是由側面看見這一盤面,並表現為特徵性的尖峰[1]。儘管盤的另一面往往會消失在塵埃的尾部,但有時仍可以看到。因此,通常只有當地球穿過彗星的軌道平面時,才能在短時間內看到彗翎[2][3]。
大多數彗星都沒有發育到足以看到彗翎的程度,但值得注意的是,確實顯示出彗翎的彗星包括1957年的阿蘭德-羅蘭彗星、1973年的柯侯德彗星[4]、1997年的海爾·波普彗星、2009年的鹿林彗星、2013年的泛星彗星、2023年的C/2022 E3 (ZTF)[5]、2024年的龐士-布魯克斯彗星[6]、2024年的C/2023 A3[7]。
相關條目
註解
- ^ Encyclopedia of science:antitail.[失效連結]
- ^ Rao, Joe. Newfound Comet Lulin to Grace Night Skies. SPACE.com. 6 February 2009 [2009-02-25]. (原始内容存档于26 February 2009).
- ^ Tosar, Borja; Paolo Candy. What is an antitail. 3.bp.blogspot. [2009-02-25]. (原始内容存档于25 February 2009).
- ^ Naugles, John E. Statement of John E. Naugle, Associate Administrator for Space Science, NASA: Comet Kohoutek Program. Committee on Science and Astronautics U.S. House of Representatives. Hearings Before the Subcommittee on Space Science and Applications (Washington DC). 7 March 1974, 25 (3): 401 [2021-11-10].
[drawing on page 403] the Skylab crewmen observed a brilliant spike or anti tail projecting toward the Sun from the head of Kohoutek [...] Dr Zdenek Sekanina concluded that the spike was not wholly due to a perspective or geometrical effect as has been assumed in previous comet studies.
- ^ Harry Baker. Optical illusion gives rare green comet an 'anti-tail' that seemingly defies physics. Space.com. 2023-01-27 [2023-01-28] (英语).
- ^ Adrien. "The Devil's Comet reveals... an anti-tail". techno-science.net. 2024-06-15 [2024-10-15] (英语).
- ^ Bob King. "Comet Tsuchinshan-ATLAS climbs, brigthens and delights!". SkyAndTelescope.org. 2024-10-15 [2024-10-15] (英语).
The comet displayed a strikingly narrow antitail the night of October 14th
外部連結
- Emily Lakdawalla. Got binoculars? Spot a comet near Saturn tonight. 2009-02-23 [2023-01-27]. (原始内容存档于2014-04-22).
- Online Encyclopedia of Science - Antitail (页面存档备份,存于互联网档案馆)