Fichièr:Sirius A and B artwork.jpg

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Fichièr d'origina(4 000 × 3 000 pixèl, talha del fichièr: 4,11 Mo, tipe MIME: image/jpeg)

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 Aquest és un arxiu d'imatge destacat a La Viquipèdia en turc (Seçkin resimler) i és considerat un dels més acurats arxius d'imatge.

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Descripcion This picture is an artist's impression showing how the binary star system of Sirius A and its diminutive blue companion, Sirius B, might appear to an interstellar visitor. The large, bluish-white star Sirius A dominates the scene, while Sirius B is the small but very hot and blue white-dwarf star on the right. The two stars revolve around each other every 50 years. White dwarfs are the leftover remnants of stars similar to our Sun. The Sirius system, only 8.6 light-years from Earth, is the fifth closest stellar system known. Sirius B is faint because of its tiny size. Its diameter is only 7,500 miles (about 12 thousand kilometres), slightly smaller than the size of our Earth. The Sirius system is so close to Earth that most of the familiar constellations would have nearly the same appearance as in our own sky. In this rendition, we see in the background the three bright stars that make up the Summer Triangle: Altair, Deneb, and Vega. Altair is the white dot above Sirius A; Deneb is the dot to the upper right; and Vega lies below Sirius B. But there is one unfamiliar addition to the constellations: our own Sun is the second-magnitude star, shown as a small dot just below and to the right of Sirius A.
Data 13 December 2005, 15:00
Font http://www.spacetelescope.org/images/heic0516b/
Autor NASA, ESA and G. Bacon (STScI)


Public domain 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.

Llegendes

Afegeix una explicació d'una línia del que representa aquest fitxer
Artist's impression of the binary star system of Sirius A and its blue companion, Sirius B

Elements representats en aquest fitxer

subjècte representat

image/jpeg

Istoric del fichièr

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Data e oraMiniaturaDimensionsUtilizaireComentari
actual10 decembre de 2007 a 17.15Miniatura per la version del 10 decembre de 2007 a 17.154 000×3 000 (4,11 Mo)DENkerhigher quality image
25 decembre de 2005 a 12.48Miniatura per la version del 25 decembre de 2005 a 12.484 000×3 000 (2,32 Mo)SuperborsukAn Artist's Impression of Sirius A and Sirius B Source: http://hubblesite.org/newscenter/newsdesk/archive/releases/2005/36/image/b

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