圣诞彗星的尾巴
(原标题: The Tail of a Christmas Comet)
2021-12-25
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12月21日，在纳米比亚黑暗的天空下，一颗彗星的尾巴从三度宽的望远镜视野中流过。伦纳德彗星（C/2021 A1）在几天前爆发，刚刚达到肉眼可见，是今年最亮的彗星。然而，在日落后靠近西方地平线的地方，双筒望远镜将使漫射彗星更容易被发现。在这幅清晰的图像中，细节显示出彗星的彗发带着一丝绿色，并跟踪了彗星的离子尾巴与太阳风磁场的相互作用。12月12日经过地球近日点，12月18日经过金星近日点后，伦纳德彗星将于1月3日接近太阳近日点。伦纳德彗星出现在12月下旬美丽的夜空中，也被称为2021年的圣诞彗星。发射更新：詹姆斯·韦伯太空望远镜
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The tail of a comet streams across this three degree wide telescopic field of view captured under dark Namibian skies on December 21. In outburst only a few days ago and just reaching naked eye visibility Comet Leonard (C/2021 A1) is this year's brightest comet. Binoculars will make the diffuse comet easier to spot though, close to the western horizon after sunset. Details revealed in the sharp image show the comet's coma with a greenish tinge, and follow the interaction of the comet's ion tail with magnetic fields in the solar wind. After passing closest to Earth on December 12 and Venus on December 18, Comet Leonard is heading toward perihelion, its closest approach to the Sun on January 3rd. Appearing in late December's beautiful evening skies Comet Leonard has also become known as 2021's Christmas Comet. Launch Update: James Webb Space Telescope
© The tail of a comet