Image:Sirius A and B Hubble photo.jpg

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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 Sirius 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.



15 Oct., 2003


Credit: H. Bond (STScI) and M. Barstow (University of Leicester)

( Reusing this image)

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Public domain This file is in the public domain because it was created by the European Space Agency and NASA. Hubble material is copyright-free and may be freely used as in the public domain without fee, on the condition that ESA and NASA is credited as the source of the material. The material was created for ESA by the Hubble European Space Agency Information Centre and for NASA by STScI under Contract NAS5-26555. or .

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Date/Time Thumbnail Dimensions User Comment
current 18:34, 12 December 2007 Thumbnail for version as of 18:34, 12 December 2007 1,280×1,398 (160 KB) DENker (higher quality)
12:42, 25 December 2005 Thumbnail for version as of 12:42, 25 December 2005 369×403 (143 KB) Superborsuk (The image of Sirius A and white dwarf Sirius B taken by Hubble Space Telescope. Source:
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