File:Earth precession.svg

原本檔案 ‎（SVG檔案，表面大細： 670 × 764 像素，檔案大細：30 KB）

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摘要

描述Earth precession.svg	Precession of Earth's rotational axis due to the tidal force raised on Earth by the gravity of the Moon and Sun.
日期	2008年5月5號
來源	Vectorized by Mysid in Inkscape after a NASA Earth Observatory image in Milutin Milankovitch Precession.
作者	NASA, Mysid

	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."

撳個日期／時間去睇響嗰個時間出現過嘅檔案。

	日期／時間	尺寸	用戶	註解
現時	2010年6月29號 (二) 15:18	670 × 764（30 KB）	Antonsusi	...
	2010年6月28號 (一) 19:12	670 × 764（30 KB）	Antonsusi	Adjustings, valid code
	2010年1月15號 (五) 02:05	670 × 764（64 KB）	LtPowers	Reverted to version as of 22:01, 4 May 2008
	2010年1月15號 (五) 00:43	670 × 764（64 KB）	Joe Kress	Reverted to version as of 22:01, 4 May 2008
	2009年8月2號 (日) 08:43	670 × 764（44 KB）	Mysid	precession movement is CCW, not clockwise
	2008年5月4號 (日) 22:01	670 × 764（64 KB）	Mysid	==Description== {{Information \|Description=Precession of rotational axis relative to the direction to the Sun at perihelion and aphelion. This changes the time of the year at which perihelion and aphelion occur. \|Source=Vectorized by [[w:User:Mysid\|Mysid]