保护地球，探索宇宙，发现文明
2022年12月7日 NGC 7293: The Helix Nebula Image Credit & Copyright: Tommaso Stella Explanation: A mere seven hundred light years from Earth, toward the constellation Aquarius, a sun-like star is dying. The dying star’s last few thousand years have produced the Helix Nebula (NGC 7293), a well studied and nearby example of a Planetary Nebula, typical of...
1993年12月，航天飞机任务STS-61的机载视图显示宇航员斯托里·马斯格雷夫和杰弗里·霍夫曼为修理哈勃太空望远镜而进行的机外活动（EVA）。STS-61是哈勃太空望远镜的首次服务任务。
2022年12月6日 M16: A Star Forming Pillar from Webb Image Credit: NASA, ESA, CSA, STScI, Processing & Copyright: Mehmet Hakan Özsaraç Explanation: What’s happening inside this interstellar mountain? Stars are forming. The mountain is actually a column of gas and dust in the picturesque Eagle Nebula (M16). A pillar like this is so low in density that you cou...
On the 19th day of the Artemis I mission, Dec. 4, 2022, a camera mounted on the Orion spacecraft captured the Moon just in frame as Orion prepared for its return powered flyby on Dec. 5, when it passed approximately 79 miles above the lunar surface. Orion performed the return powered flyby burn at 11:43 a.m. EST, changing the velocity of the spacecraft by ap...
2022年12月5日 Pleiades: The Seven Sisters Star Cluster Image Credit & Copyright: Blake Estes (iTelescope Siding Spring Obs.) & Christian Sasse Explanation: Have you ever seen the Pleiades star cluster? Even if you have, you probably have never seen it as large and clear as this. Perhaps the most famous star cluster on the sky, the bright stars of the ...
2022年12月4日 Video: Powers of Ten Video Credit & Copyright: Charles & Ray Eames (Eames Office) Explanation: How different does the universe look on very small scales? On very large scales? The most famous short science film of its generation gives breathtaking comparisons. That film, Powers of Ten, originally created in the 1960s, has been officially...
2022年12月3日 Stereo Mars near Opposition Image Credit & Copyright: Marco Lorenzi Explanation: Mars looks sharp in these two rooftop telescope views captured in late November from Singapore, planet Earth. At the time, Mars was about 82 million kilometers from Singapore and approaching its opposition, opposite the Sun in planet Earth’s sky on December...
Against a backdrop littered with tiny pinpricks of light glint a few, brighter stars. This whole collection is NGC 1858, an open star cluster in the northwest region of the Large Magellanic Cloud, a satellite galaxy of our Milky Way that boasts an abundance of star-forming regions. NGC 1858 is estimated to be around 10 million years old. Open clusters are a ...
2022年12月2日 Merging Galaxy Pair IIZw096 Image Credit: ESA/Webb, NASA & CSA, L. Armus, A. Evans Explanation: Bright at infrared wavelengths, this merging galaxy pair is some 500 million light-years away toward the constellation Delphinus. The cosmic mashup is seen against a background of even more distant galaxies, and occasional spiky foreground stars. B...
12月的天空会发生什么？你的夜晚行星的亮点，包括火星的消失和天马座。