火星月食：火卫一穿过太阳
(原标题: A Martian Eclipse: Phobos Crosses the Sun)
2022-05-09
浏览次数: 15
从太阳前面经过的是什么？它看起来像一个月亮，但它不可能是地球的月亮，因为它不是圆的。这是火星的卫星火卫一。这段特色视频是一个月前由毅力号火星车从火星表面拍摄的。火卫一直径11.5公里，比月球（我们的月球）直径小150倍，但距离它的母行星也近50倍。事实上，火卫一离火星很近，预计它将在未来5000万年内分裂并撞向火星。在短期内，火卫一的低轨道会导致比在地球上看到的更快的日食。这段特色视频是实时显示的——正如图中所示，整个过程大约花了40秒。摄像师——机器人漫游者毅力号（Percy）——继续探索火星上的耶泽洛陨石坑，不仅寻找现在干燥的世界有水历史的线索，而且寻找古代微生物生命的证据。新的社会镜子：APOD现在可以在乳齿象
查看原文解释
What's that passing in front of the Sun? It looks like a moon, but it can't be Earth's Moon, because it isn't round. It's the Martian moon Phobos. The featured video was taken from the surface of Mars a month ago by the Perseverance rover. Phobos, at 11.5 kilometers across, is 150 times smaller than Luna (our moon) in diameter, but also 50 times closer to its parent planet. In fact, Phobos is so close to Mars that it is expected to break up and crash into Mars within the next 50 million years. In the near term, the low orbit of Phobos results in more rapid solar eclipses than seen from Earth. The featured video is shown in real time -- the transit really took about 40 seconds,as shown. The videographer -- the robotic rover Perseverance (Percy) -- continues to explore Jezero Crater on Mars, searching not only for clues to the watery history of the now dry world, but evidence of ancient microbial life. New Social Mirror: APOD now available on mastodon