跳至內容

File:Mira in UV and Visible Light.jpg

頁面內容不支援其他語言。
這個檔案來自維基共享資源
維基百科,自由的百科全書

Mira_in_UV_and_Visible_Light.jpg (441 × 450 像素,檔案大小:81 KB,MIME 類型:image/jpeg


摘要

描述
English: NASA's Galaxy Evolution Explorer discovered an exceptionally long comet-like tail of material trailing behind Mira -- a star that has been studied thoroughly for about 400 years. So, why had this tail gone unnoticed for so long? The answer is that nobody had scanned the extended region around Mira in ultraviolet light until now.

As this composite demonstrates, the tail is only visible in ultraviolet light (top), and does not show up in visible light (bottom). Incidentally, Mira is much brighter in visible than ultraviolet light due to its low surface temperature of about 3,000 kelvin (about 5,000 degrees Fahrenheit).

The Galaxy Evolution Explorer, one of NASA's Small Explorer class missions, is the first all-sky survey in ultraviolet light. It found Mira's tail by chance during a routine scan. Since the mission's launch more than four years ago, it has surveyed millions of galaxies and stars. Such vast collections of data often bring welcome surprises, such as Mira's unusual tail.

The visible-light image is from the United Kingdom Schmidt Telescope in Australia, via the Digitized Sky Survey, a program affiliated with the Space Telescope Science Institute, Baltimore, Md.
日期
來源 http://www.galex.caltech.edu/media/glx2007-04r_img07.html
作者 NASA/JPL-Caltech/POSS-II/DSS/C. Martin (Caltech)/M. Seibert(OCIW)

授權條款

Public domain 本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zhNASA版權政策JPL圖像使用政策
警告:

說明

添加單行說明來描述出檔案所代表的內容

在此檔案描寫的項目

描繪內容

檔案歷史

點選日期/時間以檢視該時間的檔案版本。

日期/時間縮⁠圖尺寸使用者備⁠註
目前2011年6月30日 (四) 15:11於 2011年6月30日 (四) 15:11 版本的縮圖441 × 450(81 KB)Spitzersteph

下列頁面有用到此檔案:

全域檔案使用狀況

以下其他 wiki 使用了這個檔案:

詮釋資料