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). 

Credit:

ESO

Over de afbeelding

Id:eso0802a
Type:Observatie
Publicatiedatum:21 januari 2008
Gerelateerde berichten:eso0802
Grootte:1930 x 1659 px

Over het object

Naam:NGC 7173, NGC 7174, NGC 7176
Type:Early Universe : Galaxy : Type : Interacting
Afstand:110 miljoen lichtjaren
Constellation:Piscis Austrinus
Categorie:Galaxies

Afbeeldingstypen

Grote JPEG
369,2 KB

Achtergrond

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

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

Kleuren & filters

BandTelescoop
Optisch
B
Very Large Telescope
FORS1
Optisch
V
Very Large Telescope
FORS1
Optisch
R
Very Large Telescope
FORS1