How do galaxies grow?

Composite colour-image of the brightest galaxies in four groups located about 4 billion light-years away. The galaxies are ordered in increasing stellar mass, i.e. a rough time sequence. The brightest galaxies in group 1 and 2 both have obvious bright, gravitationally bound companions. Further images obtained with the Hubble Space Telescope shows that the brightest galaxy in group 3 has a double nucleus. Thus, these galaxies are currently in the process of merging. This discovery provides unique and powerful validation of hierarchical formation as manifested in both galaxy and cluster assembly.

Autorska prava:

ESO

O slici

Id:eso0824a
Tip:Kolaž
Datum objavljivanja:26. avgust 2008.
Povezana saopštenja:eso0824
Veličina:1646 x 408 px

O objektu

Naziv:Galaxies
Tip:Early Universe : Galaxy : Type : Interacting
Kategorija:Galaxies

Formati slika

Veliki JPEG
184,2 KB

 

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