File:Brown dwarf OTS 44 with disc.jpg

原始文件 (3,000 × 2,400像素,文件大小:2.57 MB,MIME类型:image/jpeg


摘要

描述

This artist's animation shows a brown dwarf surrounded by a swirling disc of planet-building dust. NASA's Spitzer Space Telescope spotted such a disc around a surprisingly low-mass brown dwarf, or "failed star." The brown dwarf, called OTS 44, is only 15 times the size of Jupiter, making it the smallest brown dwarf known to host a planet-forming, or protoplanetary disc.

Astronomers believe that this unusual system will eventually spawn planets. If so, they speculate that OTS 44's disc has enough mass to make one small gas giant and a few Earth-sized rocky planets.

OTS 44 is about 2 million years old. At this relatively young age, brown dwarfs are warm and appear reddish in color. With age, they grow cooler and darker.
日期 1 February 2005
来源 https://photojournal.jpl.nasa.gov/catalog/PIA07335
作者 NASA/JPL-Caltech

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:
註解
InfoField
該圖片含有註解:在維基媒體共享資源上查看註解

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

b28cf6da7e79bdb3d328d7bdefa4e1209867fb65

2,691,381 字节

2,400 像素

3,000 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2008年5月1日 (四) 12:502008年5月1日 (四) 12:50版本的缩略图3,000 × 2,400(2.57 MB)Fran Ara{{Information |Description=Artist's conception of circumstellar disk around AA Tauri |Source=http://www.spitzer.caltech.edu/Media/releases/ssc2008-06/ssc2008-06c.shtml |Date= |Author=NASA |Permission=see below |other_versions= }}

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