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.

Źródło:

ESO

O zdjęciu

Identyfikator:eso0824a
Typ:Kolaż
Data publikacji:26 sierpnia 2008
Powiązane komunikaty:eso0824
Rozmiar:1646 x 408 px

O obiekcie

Nazwa:Galaxies
Typ:Early Universe : Galaxy : Type : Interacting
Kategoria:Galaxies

Formaty zdjęć

Wielki JPEG
184,2 KB

 

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