跳转到内容

File:The violent youth of solar proxies.jpg

页面内容不支持其他语言。
这个文件来自维基共享资源
维基百科,自由的百科全书

原始文件(4,000 × 1,951像素,文件大小:2.65 MB,MIME类型:image/jpeg


摘要

描述
English: Stars similar to our Sun — “solar proxies” — enable scientists to look through a window in time to see the harsh conditions prevailing in the early or future Solar System, as well as in planetary systems around other stars. These studies could lead to profound insights into the origin of life on Earth and reveal how likely (or unlikely) the rise of life is elsewhere in the cosmos. This work has revealed that the Sun rotated more than ten times faster in its youth (over four billion years ago) than today generating a stronger magnetic field and stronger activity. This also meant that the young Sun emitted X-rays and ultraviolet radiation up to several hundred times stronger than the Sun does today.
Français : Les étoiles similaires à notre Soleil permettent aux scientifiques d'observer les conditions qui prévalent à la naissance d'un système planétaire et son évolution dans le futur. De là, on peut avoir une idée du passé de notre système solaire et de son avenir.
日期
来源
This media was produced by the International Astronomical Union (IAU), under the identifier iau0916a.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

作者 IAU/E. Guinan
授权
(二次使用本文件)
http://www.iau.org/copyright/

Featured 图像

维基共享资源

本文件是维基共享资源特色图片(Featured pictures),并被视为最好的图像之一。

如果你拥有相似质量的可采用适当著作权许可协议发布的图像,一定要上传标记推荐它。

许可协议

This media was created by the International Astronomical Union (IAU).
Their website states: "The images, videos and web texts on iau.org are released under the Creative Commons Attribution 4.0 International License and may on a non-exclusive basis be reproduced without fee, on the conditions outlined below."

Conditions:

  • The full image, footage or web text credit must be presented in a clear and readable manner to all users, with the wording unaltered (for example: "IAU". The credit should not be hidden or disassociated from the image footage. Links should be active if the credit is online. See the copyright Q&A section for guidance.
  • IAU materials may not be used to state or imply the endorsement by IAU or any IAU employee of a commercial product or service;
  • We suggest a copy of the product sent to us to be indexed in our archive;
  • If an image includes a picture of an identifiable person, using that image for commercial purposes may infringe that person's right of privacy, and separate permission should be obtained from the individual.
To the uploader: You must provide a link (URL) to the original file and the authorship information if available.
w:zh:知识共享
署名
本文件采用知识共享署名 4.0 国际许可协议授权。
您可以自由地:
  • 共享 – 复制、发行并传播本作品
  • 修改 – 改编作品
惟须遵守下列条件:
  • 署名 – 您必须对作品进行署名,提供授权条款的链接,并说明是否对原始内容进行了更改。您可以用任何合理的方式来署名,但不得以任何方式表明许可人认可您或您的使用。

说明

添加一行文字以描述该文件所表现的内容

此文件中描述的项目

描绘内容

图例 简体中文(已转写)

共享资源质量评价 简体中文(已转写)

维基共享资源特色图片 简体中文(已转写)

image/jpeg

校验和 简体中文(已转写)

37249605c81bc95db32d40e5513ec83bc5d5194e

断定方法:​SHA-1 简体中文(已转写)

数据大小 简体中文(已转写)

2,778,354 字节

1,951 像素

4,000 像素

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12月15日 (日) 20:292013年12月15日 (日) 20:29版本的缩略图4,000 × 1,951(2.65 MB)Stas1995User created page with UploadWizard

全域文件用途

以下其他wiki使用此文件: