Concept information
Preferred term
galaxy formation
Definition(s)
- The formation of galaxies, i.e., the sequence of events by which galaxies took shape, is one of the most important unresolved problems in cosmology. Most galaxy formation is thought to have happened in the early universe following the recombination era that ended about 300,000 years after the Big Bang. Small fluctuations present in the cosmic microwave background at this time, first detected by the Cosmic Background Explorer (COBE), provide evidence of matter clumping together – an essential prerequisite for galaxies to assemble in a cosmos that is generally flying apart. Unless islands of matter had been able to come together at this stage, there would have been no chance later on when the cosmic contents had become more dilute. (Encyclopedia of Science, by David Darling, https://www.daviddarling.info/encyclopedia/G/galaxy_formation.html)
Broader concept(s)
In other languages
-
French
URI
http://data.loterre.fr/ark:/67375/MDL-L6WMJMWS-D
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