File:Sirius A and B Hubble photo.jpg

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Sirius_A_and_B_Hubble_photo.jpg ‎（369 × 403像素，文件大小：179 KB，MIME类型：image/jpeg）

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摘要

描述Sirius A and B Hubble photo.jpg	English: This Hubble Space Telescope image shows Sirius A, the brightest star in our nighttime sky, along with its faint, tiny stellar companion, Sirius B. Astronomers overexposed the image of Sirius A [at centre] so that the dim Sirius B [tiny dot at lower left] could be seen. The cross-shaped diffraction spikes and concentric rings around A*, and the small ring around Sirius B, are artifacts produced within the telescope's imaging system. The two stars revolve around each other every 50 years. Sirius A, only 8.6 light-years from Earth, is the fifth closest star system known. The image was taken with Hubble's Wide Field Planetary Camera 2.
日期	2005年12月13日, 15:00:00
来源	http://www.spacetelescope.org/images/heic0516a/
作者	NASA, ESA, H. Bond (STScI), and M. Barstow (University of Leicester)
其他版本	derivative derivative 80px square for template Placed pointer to Sirius B

许可协议

This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use.
The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag.

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文件历史

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	日期/时间	大小	用户	备注
当前	2019年10月19日 (六) 09:11	369 × 403（179 KB）	BevinKacon	Reverted to version as of 19:39, 25 August 2010 (UTC) actual size from source
	2016年1月22日 (五) 06:26	2,209 × 2,410（1.43 MB）	PlanetUser	higher resolution (modified from http://www.spacetelescope.org/static/archives/images/pl_original/heic0516a.tif)
	2010年8月25日 (三) 19:39	369 × 403（179 KB）	LobStoR	progressive JPEG generated from .TIFF at quality setting 100
	2009年8月28日 (五) 22:06	369 × 403（143 KB）	Tryphon	Reverted to version as of 12:42, 25 December 2005: original size; anything bigger is just blown-up from this image.
	2007年12月12日 (三) 18:34	1,280 × 1,398（160 KB）	DENker	higher quality
	2005年12月25日 (日) 12:42	369 × 403（143 KB）	Superborsuk	The image of Sirius A and white dwarf Sirius B taken by Hubble Space Telescope. Source: http://hubblesite.org/newscenter/newsdesk/archive/releases/2005/36/image/a