欧罗巴快船与彗星
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重力辅助
天文·每日一图
飞越金星
2021年02月25日 A Venus Flyby Image Credit: NASA, JHUAPL, Naval Research Lab, Guillermo Stenborg and Brendan Gallagher Explanation: On a mission to explore the inner heliosphere and solar corona, on July 11, 2020 the Wide-field Imager on board NASA’s Parker Solar Probe captured this stunning view