跳转到内容

File:Stellar (9460796504).jpg

页面内容不支持其他语言。
這個文件來自維基共享資源
维基百科,自由的百科全书

原始文件 (1,154 × 1,127像素,文件大小:1.74 MB,MIME类型:image/jpeg


摘要

描述

(April 1, 1995) This eerie, dark structure, resembling an imaginary sea serpent's head, is a column of cool molecular hydrogen gas (two atoms of hydrogen in each molecule) and dust that is an incubator for new stars. The stars are embedded inside finger-like protrusions extending from the top of the nebula. Each "fingertip" is somewhat larger than our own solar system. The pillar is slowly eroding away by the ultraviolet light from nearby hot stars, a process called "photoevaporation." As it does, small globules of especially dense gas buried within the cloud is uncovered. These globules have been dubbed "EGGs" -- an acronym for "Evaporating Gaseous Globules." The shadows of the EGGs protect gas behind them, resulting in the finger-like structures at the top of the cloud. Forming inside at least some of the EGGs are embryonic stars -- stars that abruptly stop growing when the EGGs are uncovered and they are separated from the larger reservoir of gas from which they were drawing mass. Eventually the stars emerge, as the EGGs themselves succumb to photoevaporation. The stellar EGGS are found, appropriately enough, in the "Eagle Nebula" (also called M16 -- the 16th object in Charles Messier's 18th century catalog of "fuzzy" permanent objects in the sky), a nearby star-forming region 7,000 light-years away in the constellation Serpens. The picture was taken on April 1, 1995 with the Hubble Space Telescope Wide Field and Planetary Camera 2. The color image is constructed from three separate images taken in the light of emission from different types of atoms. Red shows emission from singly-ionized sulfur atoms. Green shows emission from hydrogen. Blue shows light emitted by doubly-ionized oxygen atoms.

Image # : PR95-44D
日期
来源 Stellar
作者 NASA on The Commons
授权
(二次使用本文件)
NASA on The Commons @ Flickr Commons

许可协议

本图像是从Flickr公众相簿计画取得而来。该上传组织可能有多种理由认定该影像无已知版权限制,例如:
  1. 该图像因版权过期属于公有领域;
  2. 该图像因其他原因(如未能遵守办理所需的手续或不符合相关条件)而释出至公有领域;
  3. 该图像的持有机构拥有版权,但对于其控制权不感兴趣;或
  4. 该图像的持有机构拥有授权无限制使用其图像的法定权利。

更多资讯请参见 https://flickr.com/commons/usage/


如果该图像拥有特定且决定性的版权资讯,请在该影像新增额外的版权标签。更多资讯请参见Commons:Licensing
这幅图片原始出处为Flickr的https://flickr.com/photos/44494372@N05/9460796504 ,作者为NASA on The Commons 。经机器人FlickreviewR在2015年9月27日审查后确定为采用No known copyright restrictions的协议授权使用。

2015年9月27日

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

描繪內容

無已知著作權限制 繁体中文(已转写)

無已知著作權限制 繁体中文(已转写)

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2015年9月27日 (日) 13:362015年9月27日 (日) 13:36版本的缩略图1,154 × 1,127(1.74 MB)Sumita Roy DuttaTransferred from Flickr via Flickr2Commons

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:

元数据