跳转到内容

File:CW Leonis UV (cropped).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 (2,514 × 1,578像素,文件大小:780 KB,MIME类型:image/jpeg


摘要

描述
English: A runaway star, plowing through the depths of space and piling up interstellar material before it, can be seen in this ultraviolet image from NASA's Galaxy Evolution Explorer. The star, called CW Leo, is hurtling through space at about 204,000 miles per hour (91 kilometers per second), or roughly 265 times the speed of sound on Earth. It is shedding its own atmosphere to form a sooty shell of discarded material. This shell can be seen in the center of this image as a bright circular blob.

CW Leo is moving from right to left in this image. It is travelling so quickly through the surrounding material that it has formed a semi-circular bow shock in front of itself, like a boat moving through water. This bow shock is made of superheated gas, which flows around the star and is left behind in its turbulent wake. This blown-out bubble is 2.7 light-years across, which is more than half the distance from our sun to the nearest star, or 2,100 times the size of Pluto's orbit.

The size of the bubble (called the "astrosheath") has allowed astronomers to estimate that CW Leo has been shedding its atmosphere for about 70,000 years. This is part of the star's natural life cycle as it runs out of hydrogen fuel and gradually throws off its outer layers to expose its bare, dying core. This core is called a white dwarf, and is the end product of all low-mass stars like our sun.

CW Leo is the second runaway star to be observed with the Galaxy Evolution Explorer. The first, Mira, was observed by the telescope back in 2006.

This image is the combination of near-ultraviolet data, shown in yellow, and far-ultraviolet data, shown in blue.
日期
来源 https://www.jpl.nasa.gov/spaceimages/details.php?id=PIA15417
作者 NASA/JPL-Caltech
其他版本
图片提取流程
本文件提取自另一个文件
:​CW Leonis UV.jpg
原始文件

许可协议

Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
警告:

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

image/jpeg

9b98ccec9189ecb92b00a7cecf3aa4f13daae47b

799,201 字节

1,578 像素

2,514 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2020年2月24日 (一) 01:022020年2月24日 (一) 01:02版本的缩略图2,514 × 1,578(780 KB)HuntsterFile:CW Leonis UV.jpg cropped 69 % horizontally, 68 % vertically using CropTool with lossless mode.

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: