标签: 彗星

肉眼可见的ZTF彗星

2023年1月21日 Naked-eye Comet ZTF Image Credit & Copyright: Óscar Martín Mesonero (Organización Salmantina de la Astronáutica y el Espacio) Explanation: Comet C/2022E3 (ZTF) is no longer too dim to require a telescope for viewing. By January 19, it could just be seen with the naked eye in this rural sky with little light pollution from a location about 20 ...

彗星2022 E3 (ZTF)

2022年12月24日 Comet 2022 E3 (ZTF) Image Credit & Copyright: Dan Bartlett Explanation: Comet C/2022 E3 (ZTF) was discovered by astronomers using the wide-field survey camera at the Zwicky Transient Facility this year in early March. Since then the new long-period comet has brightened substantially and is now sweeping across the northern constellation Coron...

七年的哈雷尘埃

2022年10月28日 Seven Years of Halley Dust Image Credit & Copyright: Petr Horalek / Institute of Physics in Opava Explanation: History’s first known periodic comet Halley (1P/Halley) returns to the inner Solar System every 75 years or so. The famous comet made its last appearance to the naked-eye in 1986. But dusty debris from Comet Halley can be seen...

南天的二颗彗星

2022年10月8日 Two Comets in Southern Skies Image Credit & Copyright: Jose J. Chambo (Cometografia) Explanation: Heading for its closest approach to the Sun or perihelion on December 20, comet C/2017 K2 (PanSTARRS) remains a sight for telescopic observers as it sweeps through planet Earth’s southern hemisphere skies. First time visitor from the remote...

星尘与彗尾

2022年8月20日 Stardust and Comet Tails Image Credit & Copyright: Rolando Ligustri (CARA Project, CAST) Explanation: Heading for its closest approach to the Sun, or perihelion, on December 19 comet C/2017 K2 (PanSTARRS) remains a sight for telescopic observers as it sweeps through planet Earth’s skies in the constellation Scorpius. The comet currently...

M10与彗星

2022年7月21日 Messier 10 and Comet Image Credit & Copyright: German Penelas Perez Explanation: Imaged on July 15 2022, comet C/2017 K2 (PanSTARRS) had a Messier moment, sharing this wide telescopic field of view with globular star cluster Messier 10. Of course M10 was cataloged by 18th century comet hunter Charles Messier as the 10th object on his list of ...

彗星C/2017 K2(PanSTARRS)

2022年6月30日 Comet C/2017 K2 (PanSTARRS) Image Credit & Copyright: Jose J. Chambo (Cometografia) Explanation: Imaged on June 20 2022, comet C/2017 K2 (PanSTARRS) shares this wide telescopic field of view with open star cluster IC 4665 and bright star Beta Ophiuchi, near a starry edge of the Milky Way. On its maiden voyage to the inner Solar System from th...

从星际空间来的博里索夫彗星

2022年3月5日 Interstellar Comet 2I Borisov NASA, ESA, and D. Jewitt (UCLA) et al. Explanation: From somewhere else in the Milky Way galaxy, Comet 2I/Borisov was just visiting the Solar System. Discovered by amateur astronomer Gennady Borisov on August 30, 2019, the first known interstellar comet is seen in these two Hubble Space Telescope images from November a...

普赛克任务将如何探索一个未开发的世界

这是一幅创作于2021年3月的插画,描绘的是NASA的普赛克航天器,它的目标是在2022年8月发射到主小行星带,以调查富含金属的小行星普赛克。 影像来源:NASA/JPL-Caltech/ASU NASA的普赛克航天器将于2022年8月发射,并于2026年抵达小行星带,它将围绕一个我们几乎无法从地球上精确定位且从未访问过的世界运行。 NASA的普赛克任务的目标是一颗富含金属的小行星,也被称为普赛克,它位于火星和木星之间的主带,是一个未知的外太空世界。从地球和太空望远镜上看,这颗小行星看起来就像一个模糊的物体。根据雷达数据,科学家们确实知道,它的形状有点像土豆,而且它会侧身旋转。 通过分析小行星反射的光线,科学家们推测小行星普赛克的金属含量异常丰富。一种可能的解释是,它形成于我们太阳系的早期,要么是作为一个星子的...

NASA的“小行星之眼”揭示了我们的近地天体邻居

有了NASA的小行星之眼,你可以观察到所有已知的近地小行星和彗星围绕太阳运行。每天更新两次最新的跟踪数据,基于网络的应用程序将自动添加新的近地天体发现供您探索。 图片来源:NASA/JPL-Caltech 通过NASA新的3D实时网络应用程序,了解更多关于近地天体数量增长的信息。 通过新的 3D实时可视化工具,您现在可以通过单击或滑动来探索接近地球轨道附近的小行星和彗星以及访问这些物体的航天器。 NASA的“小行星之眼”将这些数据传送到任何具有互联网连接的智能手机、平板电脑或计算机上——无需下载。 每年都会发现数千颗小行星和几十颗彗星,其中一些被称为近地天体(NEO),沿着穿过太阳系内部的轨道运行。目前,这些天体的总数约为28,000个,它们的数量每天都在增加。NASA资助的天文学家会对这些天体进行仔细的跟踪,...