File:Masquerading as a double star.jpg
Masquerading_as_a_double_star.jpg (568 × 586像素,文件大小:101 KB,MIME类型:image/jpeg)
摘要
描述Masquerading as a double star.jpg |
English: The object in this image is Jonckheere 900 or J 900, a planetary nebula — glowing shells of ionised gas pushed out by a dying star. Discovered in the early 1900s by astronomer Robert Jonckheere, the dusty nebula is small but fairly bright, with a relatively evenly spread central region surrounded by soft wispy edges.
Despite the clarity of this Hubble image, the two objects in the picture above can be confusing for observers. J 900’s nearby companion, a faint star in the constellation of Gemini, often causes problems for observers because it is so close to the nebula — when seeing conditions are bad, this star seems to merge into J 900, giving it an elongated appearance. Hubble’s position above the Earth’s atmosphere means that this is not an issue for the space telescope. Astronomers have also mistakenly reported observations of a double star in place of these two objects, as the planetary nebula is quite small and compact. J 900’s central star is only just visible in this image, and is very faint — fainter than the nebula’s neighbour. The nebula appears to display a bipolar structure, where there are two distinct lobes of material emanating from its centre, enclosed by a bright oval disc. A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Josh Barrington. |
日期 | |
来源 | http://www.spacetelescope.org/images/potw1312a/ |
作者 | ESA/Hubble & NASA |
许可协议
ESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the {{PD-Hubble}} tag.
Conditions:
Notes:
|
此文件中描述的项目
描绘内容
知识共享署名4.0国际 简体中文(已转写)
25 3 2013
文件历史
点击某个日期/时间查看对应时刻的文件。
日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
---|---|---|---|---|---|
当前 | 2013年3月25日 (一) 10:29 | 568 × 586(101 KB) | Jmencisom | User created page with UploadWizard |
文件用途
以下页面使用本文件:
全域文件用途
以下其他wiki使用此文件:
- de.wikipedia.org上的用途
- en.wikipedia.org上的用途
- ko.wikipedia.org上的用途
- my.wikipedia.org上的用途
- pt.wikipedia.org上的用途
- ru.wikipedia.org上的用途
- ta.wikipedia.org上的用途
- www.wikidata.org上的用途
元数据
此文件中包含有扩展的信息。这些信息可能是由数码相机或扫描仪在创建或数字化过程中所添加。
如果此文件的源文件已经被修改,一些信息在修改后的文件中将不能完全反映出来。
来源 | ESA/Hubble |
---|---|
提供者 | ESA/Hubble & NASAAcknowledgement: Josh Barrington |
图像标题 |
|
简短标题 |
|
使用条款 |
|
数据生成日期时间 | 2013年3月25日 (一) 10:00 |
关键词 |
|
联系信息 |
http://www.spacetelescope.org/ Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |