土卫一

天文·每日一图

土卫一: 有大撞击坑的小卫星

A cratered object is shown that shows on really large crater on its right side. Please see the explanation for more detailed information.
画面展示了一个布满陨石坑的天体,其右侧有一个非常大的陨石坑。有关更多详细信息,请参阅说明。

天文·每日一图

土卫一的赫歇尔陨石坑

2022年8月13日 Herschel Crater on Mimas Image Credit Cassini Imaging Team, ISS, JPL, ESA, NASA Explanation: Mimas, small 400 kilometer-diameter moon of Saturn, is host to 130 kilometer-diameter Herschel crater, one of the larger impact craters in the entire Solar System. The robotic Cassini spacecraft o

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土星反照光里的土卫一

2021年7月30日 Mimas in Saturnlight Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: Peering from the shadows, the Saturn-facing hemisphere of Mimas lies in near darkness alongside a dramatic sunlit crescent. The mosaic was captured near the Cassini spacecraft’s final close app

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土卫一:有大撞击坑的小卫星

2021年05月31日 Mimas: Small Moon with a Big Crater Image Credit & Copyright: NASA, JPL-Caltech, Space Science Institute, Cassini Explanation: Whatever hit Mimas nearly destroyed it. What remains is one of the largest impact craters on one of Saturn’s smallest round moons. Analysis indicates

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星际访客2I/Borisov彗星

2019 October 18 Interstellar Interloper 2I/Borisov Image Credit: NASA, ESA, and D. Jewitt (UCLA) et al. Explanation: After the 2017 detecton of 1I/’Oumuamua, comet 2I/Borisov has become the second recognized interstellar interloper. Like ‘Oumuamua, Borisov’s measured hyperbolic tra

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土星的卫星

2019 October 17 Moons of Saturn Image Credit: Cassini Imaging Team, SSI, JPL, NASA Explanation: On July 29, 2011 the Cassini spacecraft’s narrow-angle camera took this snapshot and captured 5 of Saturn’s moons, from just above the ringplane. Left to right are small moons Janus and Pandor

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土星反照光里的土卫一

2019 August 3 Mimas in Saturnlight Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: Peering from the shadows, the Saturn-facing hemisphere of Mimas lies in near darkness alongside a dramatic sunlit crescent. The mosaic was captured near the Cassini spacecraft’s final close

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