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2007-01-24 07:39:54 · 4 answers · asked by Anonymous in Science & Mathematics Astronomy & Space

4 answers

star formation occurs in molecular clouds, which consist mainly of molecular hydrogen H_2 and Helium He. These clouds are located in the plane of spiral galaxies (like our own), or in irregular galaxies (e.g. the Magellanic clouds).

When a shock wave passes through a molecular cloud, the densest parts will become gravitationally unstable and will eventually collapse, triggering the star formation process. On a large scale, the shock wave is created by a density wave propagating through the disk of the galaxy. This is at the origin of the beautiful spiral arms we observe in some galaxies.

2007-01-24 10:37:29 · answer #1 · answered by Anonymous · 1 0

In Huge Huge hydrogen and helium Clouds ,called star nurseries

2007-01-24 12:13:26 · answer #2 · answered by Anonymous · 1 0

in star forming regions or nebulae

2007-01-24 09:23:13 · answer #3 · answered by Belru Tytor 2 · 1 0

by the hand of God.

2007-01-24 07:42:18 · answer #4 · answered by Anonymous · 1 0

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