A cosmic embrace

In this image, two spiral galaxies, similar in looks to the Milky Way, are participating in a cosmic ballet, which, in a few billion years, will end up in a complete galactic merger — the two galaxies will become a single, bigger one.

Located about 150 million light-years away in the constellation of Canis Major (the Great Dog), NGC 2207 — the larger of the two — and its companion, IC 2163, form a magnificent pair. English astronomer John Herschel discovered them in 1835.

The fatal gravitational attraction of NGC 2207 is already wreaking havoc throughout its smaller partner, distorting IC 2163’s shape and flinging out stars and gas into long streamers that extend over 100,000 light-years. The space between the individual stars in a galaxy is so vast, however, that when these galaxies collide, virtually none of the stars in them will actually physically smash into each other.

This image was captured with the ESO Faint Object Spectrograph and Camera (EFOSC2) through three wide band filters (B, V, R). EFOSC2 has a 4.1 x 4.1 arcminute field of view and is attached to the 3.6-metre telescope at ESO’s La Silla Observatory in Chile.

Crédit:

ESO

À propos de l'image

Identification:ngc2207
Type:Observation
Date de publication:3 décembre 2009 23:18
Taille:1995 x 2005 px

À propos de l'objet

Nom:IC 2163, NGC 2207
Type:Local Universe : Galaxy : Type : Spiral
Distance:150 million années lumière
Constellation:Canis Major
Catégorie:Galaxies

Formats des images

Grand JPEG
1,1 Mio
JPEG taille écran
184,8 Kio

Fonds d'écran

1024x768
180,0 Kio
1280x1024
321,6 Kio
1600x1200
532,6 Kio
1920x1200
715,2 Kio
2048x1536
821,2 Kio

Coordinates

Position (RA):6 16 22.14
Position (Dec):-21° 22' 23.25"
Field of view:5.23 x 5.26 arcminutes
Orientation:North is 1.8° right of vertical

Couleurs & filtres

DomaineLongueur d'ondeTélescope
Visible
B
440 nmESO 3.6-metre telescope
EFOSC2
Visible
V
547 nmESO 3.6-metre telescope
EFOSC2
Visible
R
643 nmESO 3.6-metre telescope
EFOSC2