Image:Sirius A and B Hubble photo.jpg

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Description

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.
Source

http://www.spacetelescope.org/images/html/heic0516a.html
Date

15 Oct., 2003
Author

NASA, ESA
Credit: H. Bond (STScI) and M. Barstow (University of Leicester)
Permission
(Reusing this image)

see below


Public domain This file is in the public domain because it was created by NASA and the European Space Agency. Hubble material is copyright-free and may be freely used as in the public domain without fee, on the condition that NASA and ESA is credited as the source of the material. The material was created for NASA by STScI under Contract NAS5-26555 and for ESA by the Hubble European Space Agency Information Centre. [1] or [2].

Historique du fichier

Cliquer sur une date et une heure pour voir le fichier tel qu’il était à ce moment-là

Date et heureDimensionsUtilisateurCommentaire
actuel12 décembre 2007 à 20:341 280×1 398 (160 Kio)DENker (higher quality)
25 décembre 2005 à 14:42369×403 (143 Kio)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)

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