Abell 4067
Antennae
Antennae
HCG 16
M 51
Interaction of GalaxiesGravitational interactions between galaxies are far more common than one might think assuming that the space density of galaxies is uniform. The galaxies are grouped into clusters, small groups, or pairs: far from being isolated systems they are formed and evolve in interaction with their environment and in particular with neighbouring galaxies. The gravitational interactions produce giant tidal waves in the discs of the galaxies, giving rise to spiral arms and provoking outbursts of star formation. Collisions between galaxies could contribute to the activity at the nuclei of radio galaxies and quasars. [Ref 6] |
| Interacting Galaxies (7 images)
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| Abell 4067 | Antennae | Antennae | HCG 16 | M 51 | more > |
| Groups of Galaxies (7 images)
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 HCG 16 |  HCG 16 |  NGC 5044 |  SL2S J085446-012137 |  Stephan's Quintet | more > |
| Clusters of Galaxies (33 images)
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 1WGA J2235.3-2557 |  2A 0335 096 |  2A 0335 096 |  2XMM J083026.2 524133 |  Abell 1644 | more > |