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The planet PDS 70b inside a protoplanetary disk
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图注： An image of the planet PDS 70b. The young star PDS 70b has a protoplanetary disk surrounding it. Disks like these contains gas, fine sandy particles that astronomers refer to as dust and also larger bodies ranging from objects the size of pebbles to protoplanets (planets that are still forming).
This image was taken in infrared light using adaptive optics. Adaptive optics is a technique that uses flexible mirrors and computer analysis to remove the blurring effect of the Earth's atmosphere. This allows astronomers to search regions close to stars like PDS 70 that would otherwise be swamped by light from the star spread out by the Earth's atmosphere. In the center is a black circle. This is caused by a coronograph, a small circle that blocks out light from the parent star. This is surrounded by a bright oval, infrared light emitted from the material in the protoplanetary disk. To the right of the black circle covering the star is a bright dot. This is PDS 70b, a giant planet that is still forming .
来源： ESO/ A. Müller, MPIA
来源链接
词汇表:
行星形成 , 原行星 , 原行星盘 , 自适应光学
分类：
系外行星与天体生物学
授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标
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1.59 MB)
Atmosphere of Venus
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图注： This image of Venus was captured in ultraviolet light by the Pioneer Venus Orbiter and highlights features of the planet’s thick atmosphere that are not visible in ordinary light. Venus has a dense, cloudy atmosphere composed mainly of carbon dioxide. In ultraviolet wavelengths, patterns in the upper cloud layers become visible, revealing swirling structures and bright and dark bands caused by differences in the composition and motion of the atmosphere. These ultraviolet features help scientists map wind patterns, atmospheric circulation, and cloud dynamics high above Venus’s surface.
Unlike Earth’s atmosphere, which is relatively transparent in visible light, Venus’s atmosphere is so thick that no direct view of the surface is possible from space without special instruments. The extreme pressure and temperature near Venus’s surface are consequences of this dense gaseous envelope, making Venus a dramatic example of how different planetary atmospheres can be. This image demonstrates how observing a planet’s atmosphere in different wavelengths, such as ultraviolet, reveals details about its structure and behaviour.
来源： NASA
来源链接
词汇表:
大气层 , 金星
授权许可： 公共领域 公共领域 图标
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8.09 MB)
Venus Transit from Tempe, AZ, USA , June 5, 2012
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图注： While the planet Venus regularly passes between the Sun and the Earth, most of the time it passes above or below the Sun when observed from Earth. On rare occasions, the planet Venus passes directly in front of the Sun for observers on Earth. The last such Venus transits were in 2004 and 2012, respectively. The next such transit will be in 2117. The picture was taken at 18:54 PDT on June 5, 2012, from Tempe, Arizona, US. The telescope used was an 8" Schmidt-Cassegrain with ND5 filter; the camera was a Sony NEX5N with the APS sensor placed at prime focus. Clearly visible are the disk of the Sun, Venus as a prominent round spot. Several sun spots also appear on the solar disk.
来源： Stephen Rector
来源链接
词汇表:
凌 , 金星
分类：
太阳系
授权许可： 知识共享许可协议 Attribution-ShareAlike 3.0 Unported 知识共享许可协议 Attribution-ShareAlike 3.0 Unported 图标
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4.60 MB)
Baghdad Planetarium Using Telescopes and Planetarium Software poster
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图注： Promotional poster for the astronomy training workshop titled “Using Telescopes and Planetarium Software,” held on August 3–4, 2025, at the Baghdad Planetarium. Organized by the Scientific Welfare Department – Ministry of Youth and Sports in cooperation with the IAU OAE National Astronomy Education Coordinator team for Iraq.
来源： NAEC team Iraq
Group photo of the participants at the Beijing Planetarium
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图注： Teacher Training Participants at the Beijing Planetarium
来源： OAE Center China, Nanjing
