保护地球，探索宇宙，发现文明
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，...
2021年12月03日 Comet Leonard and the Whale Galaxy Image Credit & Copyright: Gregg Ruppel Explanation: Sweeping through northern predawn skies, on November 24 Comet Leonard (C/2021 A1) was caught between two galaxies in this composite telescopic image. Sporting a greenish coma the comet’s dusty tail seems to harpoon the heart of NGC 4631 (top) also kn...
2021年11月28日 A High Cliff on Comet Churyumov-Gerasimenko Image Credit & Licence: ESA, Rosetta spacecraft, NAVCAM; Additional Processing: Stuart Atkinson Explanation: This high cliff occurs not on a planet, not on a moon, but on a comet. It was discovered to be part of the dark nucleus of Comet Churyumov-Gerasimenko (CG) by Rosetta, a robotic spacecraft l...
2021年11月21日 Introducing Comet Leonard Image Credit & Copyright: Dan Bartlett Explanation: Here comes Comet Leonard. Comet C/2021 A1 (Leonard) was discovered as a faint smudge in January 2021 when it was out past Mars — but its orbit will take the giant shedding ice-ball into the inner Solar System, passing near both Earth and Venus in December bef...
2021年11月13日 Rosetta’s Comet in Gemini Image Credit & Copyright: Rolando Ligustri (CARA Project, CAST) Explanation: Returning along its 6.4 year orbit, periodic comet Churyumov-Gerasimenko (67P) is caught in this telescopic frame from November 7. Sweeping past background stars in the constellation Gemini the comet’s dusty tail stretches towar...
2021年10月22日 A Comet and a Crab Image Credit & Copyright: Jose Mtanous Explanation: This pretty field of view spans over 2 degrees or 4 full moons on the sky, filled with stars toward the constellation Taurus, the Bull. Above and right of center in the frame you can spot the faint fuzzy reddish appearance of Messier 1 (M1), also known as the Crab Nebula....
2021年9月10日 Rosetta’s Comet in View Image Credit & Copyright: Rolando Ligustri (CARA Project, CAST) Explanation: Faint comet Churyumov-Gerasimenko (67P) sweeps past background stars in the constellation Taurus and even fainter distant galaxies in this telescopic frame from September 7. About 5 years ago, this comet’s 4 kilometer spanning, dou...
2021年01月07日 Total Solar Eclipse 2020 Image Credit & Copyright: Miloslav Druckmuller, Andreas Moller, (Brno University of Technology), Explanation: Along a narrow path crossing southern South America through Chile and Argentina, the final New Moon of 2020 moved in front of the Sun on December 14 in the year’s only total solar eclipse. Within about ...
十月会发生什么?，一轮秋月以及蓝月，火星通宵达旦和一场穿越银河系的旅行。 Credit：NASA JPL 翻译：莫辞莫问的莫、林子杰 不仅一个，在月初和月未，这个月将带来两个圆满月。十月一日的满月被称作收获月，收获月是满月的名字，它最接近九月春分。每年两天中的一天，白天和黑夜长度相等。大多数年的收获月在九月落下，但每隔几年，它就会转移到10月。这个名字可以追溯到美洲原住民和欧洲传统，与收获时间有关。 Credit：NASA JPL Credit：NASA JPL 十月底，三十一号，我们将享受第二次满月。当一个月内有两次满月时，第二个满月往往被称作蓝月，蓝月还有另外一个更为传统的定义，但这是最为人熟知的。请注意这是2020年仅有的两次满月。 Credit：NASA JPL 十月是观察火星的好时机，因为这颗行星现在...
2020 June 6 Comet PanSTARRs and the Galaxies Image Credit & Copyright: Dan Bartlett Explanation: Comet PanSTARRs, C/2017 T2, shared this stunning telescopic field of view with galaxies M81 and M82 on May 22/23. Of course, the galaxies were some 12 million light-years distant and the comet about 14 light-minutes away, seen in planet Earth’s sky towa...