伦纳德彗星在JWST发射羽状物后面
(原标题: Comet Leonard behind JWST Launch Plume)
2021-12-27
浏览次数: 4
这两条条纹中哪一条是彗星？虽然它们都有类似彗星的特征，但较低的条纹是唯一真正的彗星。下面的条纹显示了伦纳德彗星的彗发和彗尾。伦纳德彗星是一个城市大小的岩石冰块，它在继续绕太阳旋转的过程中穿过了太阳系内部。伦纳德彗星最近经过了离地球和金星最近的地方，并将于下周绕太阳公转。最近几周，这颗肉眼仍然可见的彗星已经长出了一条长长的、不断变化的尾巴。相比之下，上面的条纹是两天前将詹姆斯韦伯太空望远镜（JWST）带离地球的阿丽亚娜5号火箭发射的羽流。这张特色的单次曝光照片拍摄于泰国，前景的塔尖位于Doi Inthanon国家公园的一座宝塔顶端。JWST是美国宇航局迄今为止最大、最强大的太空望远镜，将在地球-太阳L2点附近绕太阳运行，并计划于2022年夏天开始科学观测。画廊：伦纳德彗星2021画廊：韦伯太空望远镜发射：2021年12月25日
查看原文解释
Which one of these two streaks is a comet? Although they both have comet-like features, the lower streak is the only real comet. This lower streak shows the coma and tail of Comet Leonard, a city-sized block of rocky ice that is passing through the inner Solar System as it continues its looping orbit around the Sun. Comet Leonard has recently passed its closest to both the Earth and Venus and will round the Sun next week. The comet, still visible to the unaided eye, has developed a long and changing tail in recent weeks. In contrast, the upper streak is the launch plume of the Ariane V rocket that lifted the James Webb Space Telescope (JWST) off the Earth two days ago. The featured single-exposure image was taken from Thailand, and the foreground spire is atop a pagoda in Doi Inthanon National Park. JWST, NASA's largest and most powerful space telescope so far, will orbit the Sun near the Earth-Sun L2 point and is scheduled to start science observations in the summer of 2022. Gallery: Comet Leonard 2021 Gallery: Webb Space Telescope Launch: 2021 December 25
© Matipon Tangmatitham (NARIT)