Fichier:Whirpool Galaxy.jpg

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English: This Hubble composite image shows visible starlight as well as light from the emission of glowing hydrogen, which is associated with the most luminous young stars in the spiral arms.

The Whirlpool Galaxy, also known as M51 or NGC 5194, is having a close encounter with a nearby companion galaxy, NGC 5195, just off the upper edge of this image. The companion's gravitational pull is triggering star formation in the main galaxy, as seen in brilliant detail by numerous, luminous clusters of young and energetic stars. The bright clusters are highlighted in red by their associated emission from glowing hydrogen gas.

This Wide Field Planetary Camera 2 image enables researchers to clearly define the structure of both the cold dust clouds and the hot hydrogen and link individual clusters to their parent dust clouds.

Intricate structure is also seen for the first time in the dust clouds. Along the spiral arms, dust "spurs" are seen branching out almost perpendicular to the main spiral arms. The regularity and large number of these features suggests to astronomers that previous models of "two-arm" spiral galaxies may need to be revisited. The new images also reveal a dust disk in the nucleus, which may provide fuel for a nuclear black hole.
Español: Galaxia Remolino (M51), imagen tomada por el telescopio espacial Hubble.
Date
Source http://hubblesite.org/newscenter/archive/releases/2001/10/image/a/ (direct link)
Auteu NASA and The Hubble Heritage Team (STScI/AURA)
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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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5 d'Avri 2001

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Date/TansTiote imageDiminsionsUzeuFichié éd chés conmints
courant13 ed Marche 2011 à 01:25Image pou l'vérchon éd 13 ed Marche 2011 à 01:251 645 × 2 050 (4,39 Mio)TryphonHigher resolution, from http://hubblesite.org/newscenter/archive/releases/2001/10/image/a/.
7 ed Juillet 2005 à 08:06Image pou l'vérchon éd 7 ed Juillet 2005 à 08:06648 × 808 (111 kio)HispaGalaxia Remolino M51 ==Licencia== {{PD-USGov}} == Fuente == Imagen Original obtenida de http://en.wikipedia.org/wiki/Image:Whirpool_Galaxy.jpg http://heritage.stsci.edu/2001/10/big.html

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