Fichier:Hubble Interacting Galaxy NGC 520 (2008-04-24).jpg

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Description

NGC 520 is the product of a collision between two disk galaxies that started 300 million years ago. It exemplifies the middle stages of the merging process: the disks of the parent galaxies have merged together, but the nuclei have not yet coalesced. It features an odd-looking tail of stars and a prominent dust lane that runs diagonally across the center of the image and obscures the galaxy. NGC 520 is one of the brightest galaxy pairs on the sky, and can be observed with a small telescope toward the constellation of Pisces, the Fish, having the appearance of a comet. It is about 100 million light-years away and about 100,000 light-years across. The galaxy pair is included in Arp's catalog of peculiar galaxies as Arp 157.

This image is part of a large collection of 59 images of merging galaxies taken by the Hubble Space Telescope and released on the occasion of its 18th anniversary on 24th April 2008.

Concernant l’objet
Nom de l’objet NGC 520, Arp 157, VV 231, KPG 031
Description de l’objet Interacting Galaxies
Position (J2000) 01 24 35.42
+03 47 55.0
Constellation Pisces
Distance 100 million light-years (50 million parsecs)
Concernant les données
Description des données The Hubble image was created using HST data from proposal 9735: B. Whitmore (STScI)
Instrument ACS/WFC
Date(s) d’exposition October 22, 2004
Durée d’exposition 77 minutes
Filtres F435W (B), F555W (V), and F814W (I)
Date
Source http://hubblesite.org/newscenter/archive/releases/2008/16/image/bo/ (direct link)
Auteur NASA, ESA, the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration, and B. Whitmore (STScI)
Autorisation
(Réutilisation de ce fichier)
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.

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actuel27 avril 2008 à 19:34Vignette pour la version du 27 avril 2008 à 19:343 271 × 1 828 (6,47 Mio)wikimediacommons>とある白い猫{{Information |Description=NGC 520 is the product of a collision between two disk galaxies that started 300 million years ago. It exemplifies the middle stages of the merging process: the disks of the parent galaxies have merged together, but the nuclei h

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