Astronomy Picture of the Day
每日一天文图
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2006 April 26
探索宇宙!每天一幅不同的影像或照片,并由专业天文学家的简短解释和说明,带你遨游迷人的宇宙。
2006年4月26日(农历二〇〇六年三月二十九)
http://www.phys.ncku.edu.tw/~ast ... cometsw_eso_big.jpg
Crumbling Comet Schwassmann-Wachmann 3 Approaches
Credit: FORS1, 8.2-meter VLT Kueyen, ESO
Explanation: A crumbling comet will soon pass near the Earth. Comet 73P/Schwassmann-Wachmann 3 is brightening and may even be visible to the unaided eye when the fragmented comet zooms past Earth during the middle of next month. Still, the small comet poses no Earth hazard, since it will pass the Earth at about 25 times the distance of the Moon. Exactly how bright Comet Schwassman-Wachmann 3 will get is unknown. It is even possible, althought unlikely, that debris from the comet will have spread out enough to cause a notable meteor shower. Pictured above, Fragment B of Comet Schwassman-Wachmann 3 was photographed two nights ago by a 8.2-meter Very Large Telescope in Chile. Visible to the lower right of the large B fragment are many mini-comets that have broken off and now orbit the Sun separately. Each mini-comet itself sheds gas and dust and so appears to have its own hazy coma. The comet will pass closest to the Sun on June 7.
瓦解中的施瓦斯曼-瓦赫曼3号彗星
影像提供: FORS1, 8.2-meter VLT Kueyen, ESO
解释: 一颗破碎的彗星会很快路过地球了。 彗星 73P/施瓦斯曼-瓦赫曼3号正在变亮而且可能被肉眼所见,当那破碎的彗星在下月中旬快速的掠过地球时。但是,小彗星对地球并没有危险,因为它将从25倍的月地距离处路过地球。彗星施瓦斯曼-瓦赫曼3到底有多亮还是一个未知之数。很有可能的是,尽管不大可能,虽然这颗彗星的碎片有可能会散得很开并导致一场引人注目的流星雨。上图,彗星施瓦斯曼-瓦赫曼3是前晚用智利的8.2米极大望远镜拍摄的。在较大的B碎片[左上方]的右下,可见许多瓦解出来和独立围绕太阳运行的迷你彗星。每颗迷你彗星都喷发着气体和尘埃,因此看上去有它自己朦胧的彗发。彗星将在6月7号最接近太阳。。(施瓦斯曼-瓦赫曼3号彗星 -- Schwassmann-Wachmann 3; 极大望远镜 -- Very Large Telescope)
Tomorrow's picture: open space
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