罗塞塔号彗星在望
(原标题: Rosetta's Comet in View)
2021-09-10
浏览次数: 33
在这张9月7日拍摄的望远镜画面中，暗淡的彗星Churyumov-Gerasimenko （67P）扫过金牛座的背景恒星，甚至更暗淡的遥远星系。大约5年前，罗塞塔号历史性的彗星任务完成后，这颗彗星4公里宽的双叶核心成为了地球上机器人的最后安息之地。在离开木星轨道后，丘留莫夫-格拉西门科现在正沿着它6.4年周期的轨道返回，于11月2日到达下一个近日点或最接近太阳的地方。11月12日，这颗彗星最接近地球的近地点将使其进入约0.42天文单位。即使是在它最亮的时候（预计在11月下旬和12月），也需要望远镜才能看到它。9月7日，罗塞塔彗星距离我们美丽的星球约0.65天文单位，约5.4光分。
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Faint comet Churyumov-Gerasimenko (67P) sweeps past background stars in the constellation Taurus and even fainter distant galaxies in this telescopic frame from September 7. About 5 years ago, this comet's 4 kilometer spanning, double-lobed nucleus became the final resting place of robots from planet Earth, following the completion of the historic Rosetta mission to the comet. After wandering out beyond the orbit of Jupiter, Churyumov-Gerasimenko is now returning along its 6.4 year periodic orbit toward its next perihelion or closest approach to the Sun, on November 2. On November 12, the comet's perigee, its closest approach to Earth, will bring it within about 0.42 astronomical units. Telescopes should still be required to view it even at its brightest, predicted to be in late November and December. On September 7 Rosetta's comet was about 0.65 astronomical units away or about 5.4 light-minutes from our fair planet.
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