File:Protoplanetary-disk.jpg

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Protoplanetary-disk.jpg ‎（576 × 312 像素，檔案大細：33 KB ，MIME類型：image/jpeg）

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描述

Artist's concept of a protoplanetary disk, where particles of dust and grit collide and accrete forming planets or asteroids

العربية: تصور للقرص الكوكبي الأولي

來源

作者

NASA,

NASA material is within the public domain if not otherwise noted

Other versions

Derivative works of this file: Protoplanetary-disk2.jpg

Image:Protoplanetary disk.jpg, version with asteroid artifacts

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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	日期／時間	縮圖	尺寸	用戶	註解
現時	2006年1月30號 (一) 00:15		576 × 312（33 KB）	Arnomane	{{Information\| \|Description = Artist's concept of a protoplanetary disk \|Source = NASA; http://origins.jpl.nasa.gov/stars-planets/ra4.html \|Date = - \|Author = NASA \|Permission = NASA material is within the public domain if not otherwise noted \|other_versi

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