NASA’s Curiosity Mars rover used its black-and-white navigation cameras to capture panoramas of this scene at two times of day. This was the view at 8:30 a.m. local Mars time on Nov. 16, 2021 (the 3,299th Martian day, or sol, of the mission) and again at 4:10 p.m. local Mars time. The two times of d […]
2021年12月02日 NGC 6822: Barnard’s Galaxy Image Credit & Copyright: Dietmar Hager, Eric Benson Explanation: Grand spiral galaxies often seem to get all the glory, flaunting their young, bright, blue star clusters in beautiful, symmetric spiral arms. But small galaxies form stars too, like ne
Nebula [ neb-yuh-luh ]: star-forming cloud of gas and dust. Noun, plural neb·u·lae [neb-yuh-lee, -lahy] 星云:由气体和尘埃组成的恒星形成云。名词，复数neb·u·lae [neb-yuh-lee， -lahy] These four nebulae are known for their breathtaking beauty: the Eagle Nebula (which contains the Pillars of Creation), the Omega Nebula, the T
2021年12月01日 A Blue-Banded Blood Moon Image Credit: Angel Yu Explanation: What causes a blue band to cross the Moon during a lunar eclipse? The blue band is real but usually quite hard to see. The featured HDR image of last week’s lunar eclipse, however — taken from Yancheng, China —
在木卫二发现羽流是一个令人兴奋的展望，但科学家警告说，即使近距离观察，也会很棘手。 2005年，从土星卫星土卫二表面喷发出的明亮的水状羽流图像吸引了全世界的目光。从土卫二南极地区喷射出来的巨大蒸汽柱、冰粒子和有机分子表明，在土卫二的冰壳下面有液态水海洋，也证实了土卫二的地质活动非常活跃。烟柱还将土卫二和太阳系外的其他行星推向了NASA寻找生命迹象名单的前列，这些星球既没有大气层，也远离太阳热量。 科学家们现在正准备前往另一个可能有羽状物的冰封海洋世界：木星的卫星木卫二。NASA的欧罗巴快船计划于2024年发射，它将从木卫二的深层内部到表面对其进行研究，以确定它是否含有使其成为适宜生命家园的成分
As the Crew-2 mission departed the International Space Station aboard SpaceX Crew Dragon Endeavour, the crew snapped this image of the station during a flyaround of the orbiting lab that took place following undocking from the Harmony module’s space-facing port on Nov. 8, 2021. 2021年11月8日，当Crew-2任务机
2021年11月30日 In Motion: Uranus and Moons Video Credit: David Campbell (U. Hertfordshire), Bayfordbury Observatory Explanation: What’s that moving across the sky? A planet just a bit too faint to see with the unaided eye: Uranus. The gas giant out past Saturn was tracked earlier this month near
NGC 6891 is a bright, asymmetrical planetary nebula in the constellation Delphinus, the Dolphin. This Hubble image reveals a wealth of structure, including a spherical outer halo that is expanding faster than the inner nebula, and at least two ellipsoidal shells that are orientated differently. The
2021年11月29日 The Extraordinary Spiral in LL Pegasi Image Credit: NASA, ESA, Hubble, HLA; Processing & Copyright: Jonathan Lodge Explanation: What created the strange spiral structure on the upper left? No one is sure, although it is likely related to a star in a binary star system entering the p
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 C
