File:Einstein revisited.jpg
原始文件 (1,200 × 900像素,文件大小:156 KB,MIME类型:image/jpeg)
摘要
描述Einstein revisited.jpg |
English: A century ago, Albert Einstein published his famous theory of relativity. He proposed that all objects physically warp the fabric of space, with larger masses producing a more pronounced effect, and very massive objects (such as the Sun) causing light to travel along curved paths through space. Such an effect was first observed during the 1919 solar eclipse by English astronomer Arthur Eddington.
Researchers had to wait a century, however, to get a telescope powerful enough to detect this gravitational microlensing caused by a star outside the Solar System. Even around objects with very large masses, such as stars, this effect is very slight, making such detections extremely challenging for ground-based telescopes. It is, however, within the capabilities of the NASA/ESA Hubble Space Telescope, which gathered the data comprising this Picture of the Week. The bright star in the centre of the image is the nearby white dwarf Stein 2051B, only 17 light-years from Earth. The smaller star below is about 5000 light-years away. Astronomers observed Stein 2051B eight times within two years while the white dwarf travelled in front of of the distant background star. During the close alignment, the white dwarf’s gravity bent the light from the distant star, making it appear offset by about 2 milliarcseconds from its actual position. This deviation is so small that it is equivalent to observing an ant crawl across the surface of a 1€ coin from 2300 kilometres away. |
日期 | |
来源 | https://www.spacetelescope.org/images/potw1724a/ |
作者 | NASA, ESA, and K. Sahu (STScI) |
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
描繪內容
12 6 2017
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 | 2017年6月12日 (一) 15:09 | 1,200 × 900(156 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:
- en.wikipedia.org上的用途
- ta.wikipedia.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。
提供者 | NASA, ESA, and K. Sahu (STScI) |
---|---|
来源 | ESA/Hubble |
简短标题 |
|
图像标题 |
|
使用条款 |
|
数据生成日期时间 | 2017年6月12日 (一) 06:00 |
使用软件 | Adobe Photoshop CC 2017 (Macintosh) |
文件修改日期时间 | 2017年5月23日 (二) 14:01 |
数字化日期时间 | 2016年9月21日 (三) 05:46 |
元数据最后修改日期 | 2017年5月23日 (二) 10:01 |
原始文件唯一ID | xmp.did:9e255b6a-a439-41b3-af6f-2d32293a546c |
关键词 | Stein 2051 |
联系信息 |
-{R|http://www.spacetelescope.org}- Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
IIM版本 | 4 |