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Star birth

author: H.Piraud/Novapix

reference: a-eto99-50011

Image Size 300 DPI: 25 * 17 cm

A protostar is an object that forms by contraction out of big gas of a molecular cloud. When the heart of this matter is big enough, its temperature increases and nuclear reactions make the star shine.

Keywords for this photo:

ASTRONOMY - DARK NEBULA - DUST - EVOLUTION - FORMATION - ILLUSTRATION - NEBULA - STAR - STAR BIRTH - STAR FORMATION -