Cosmic interactions

Colour-composite image of the triplet of galaxies, catalogued as NGC 7173 (top), 7174 (bottom right) and 7176 (bottom left), and located 106 million light-years away towards the constellation of Piscis Austrinus (the 'Southern Fish'). This triplet of galaxies makes up part of the Hickson Compact Group HCG 90. 

NGC 7173 and 7176 are elliptical galaxies, while NGC 7174 is a spiral galaxy with quite disturbed dust lanes and a long, twisted tail. This seems to indicate that the two lower galaxies - whose combined shape bears some resemblance to that of a sleeping baby - are currently interacting. Astronomers have suggested that the three galaxies will finally merge. 

The size of the image is about 5.3 arcminutes. The image is based on data obtained with the VLT FORS1 instrument on ESO's Very Large Telescope through three different filters, B, V, and R. The data were extracted from the ESO Science Archive and fully processed by Henri Boffin (ESO). 

Crédit:

ESO

À propos de l'image

Identification:eso0802a
Type:Observation
Date de publication:21 janvier 2008
Communiqués de presse en rapport:eso0802
Taille:1930 x 1659 px

À propos de l'objet

Nom:NGC 7173, NGC 7174, NGC 7176
Type:Early Universe : Galaxy : Type : Interacting
Distance:110 million années lumière
Constellation:Piscis Austrinus
Catégorie:Galaxies

Formats des images

Grand JPEG
369,2 Kio

Fonds d'écran

1024x768
107,5 Kio
1280x1024
178,0 Kio
1600x1200
272,7 Kio
1920x1200
348,7 Kio
2048x1536
471,9 Kio

Coordinates

Position (RA):22 2 6.85
Position (Dec):-31° 59' 36.71"
Field of view:6.44 x 5.54 arcminutes
Orientation:North is 0.0° left of vertical

Couleurs & filtres

DomaineTélescope
Visible
B
Very Large Telescope
FORS1
Visible
V
Very Large Telescope
FORS1
Visible
R
Very Large Telescope
FORS1

 

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