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WISE Survey Capturing the Whole Sky in Infrared Light
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图注: This image presents the entire sky mapped in infrared light from space by the WISE satellite. While dust in the plane of the Milky Way blocks visible light, obscuring the heart of our Galaxy, infrared light passes through the dust. The most prominent feature is the broad, bright band running horizontally through the centre — this is the plane of our Milky Way galaxy. Numerous brighter knots and patches appear above and below the band, marking regions of active star formation and nearby galaxies.
Such a dataset is a classic example of an astronomical survey, in which large portions of the sky is scanned to build a comprehensive catalogue of cosmic sources. The WISE satellite operated in space, allowing it to study parts of the infrared spectrum blocked by Earth's atmosphere.
来源: NASA/JPL-Caltech
来源链接
词汇表:
红外天文学 , 天文巡天
授权许可: 公共领域 公共领域 图标
文件
( 图像
64.59 MB)
欧罗巴
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图注: 这张照片由美国国家航空航天局的伽利略探测器于1996年9月拍摄,展示了木星的被冰覆盖的卫星——欧罗巴,以近似自然色呈现。画面中长长的暗线是冰壳上的裂缝,其中一些裂缝长度超过3000公里(1850英里)。图像下方三分之一处,包含中央暗点的明亮区域是一个直径约50公里(31英里)新形成的撞击坑。欧罗巴的直径约为3160公里(1950英里),与地球的卫星月球大小相当。
来源: 美国国家航空航天局/喷气推进实验室/德国航空航天中心
词汇表:
伽利略卫星 , 卫星
分类:
太阳系
授权许可: 公共领域 公共领域 图标
文件
( 图像
622.91 kB)
木卫一(伊奥)
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图注: 美国国家航空航天局的伽利略号航天器于1999年7月3日获得了木星卫星木卫一的最高分辨率图像。木卫一是伽利略-伽利雷 1610 年发现的四颗卫星之一。木卫一的颜色源于硫化物,是大量火山活动存在的证据。木星和邻近卫星的潮汐力是木卫一火山活动的原因。
来源: 美国宇航局/JPL/亚利桑那大学
来源链接
词汇表:
伽利略卫星 , 木卫一,音译为艾奥 , 卫星
分类:
太阳系
授权许可: 公共领域 公共领域 图标
文件
( 图像
789.81 kB)
A visible light image of the Andromeda Galaxy
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图注: The Andromeda Galaxy viewed in visible light. Like our Milky Way, Andromeda is a barred spiral galaxy. Here we can see its bright core and spiral disk. The glow from the stars in the disk is interrupted by lanes of dust that form part of its spiral structure.
Andromeda is the largest galaxy in the Local Group of galaxies that includes the Milky Way.
To the left of the core and just above the disk we see the dwarf galaxy M32 and to the right and below the disk we see the dwarf galaxy M110. These are both satellite galaxies of the Andromeda Galaxy.
来源: Torben Hansen
来源链接
词汇表:
仙女座星系 , 盘状星系 , 矮星系 , 梅西耶天体 , 漩涡星系 , 星系棒
分类:
星系
授权许可: 知识共享许可协议 Attribution 2.0 Generic 知识共享许可协议 Attribution 2.0 Generic 图标
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( 图像
1.10 MB)
The Happy Face of Gravitational Lensing
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图注: Captured by the NASA/ESA Hubble Space Telescope, this image showcases the galaxy cluster SDSS J1038+4849, affectionately dubbed the "happy face" cluster due to its striking resemblance to a smiling face. The two bright galaxies at the center resemble orange eyes, while the arcs surrounding them form the illusion of a smile. These arcs are actually a result of strong gravitational lensing, a phenomenon where the cluster's immense gravitational pull distorts and magnifies light from background objects. This particular case of gravitational lensing has produced an Einstein Ring, a ring-like structure formed by the precise alignment of the source, lens, and observer. By studying these gravitational lenses, astronomers gain insights into the properties of massive galaxies, allowing for a deeper understanding of the early Universe.
来源: NASA/ESA
来源链接
词汇表:
引力透镜
分类:
宇宙学
, 星系
授权许可: 公共领域 公共领域 图标
文件
( 图像
1.53 MB)
