<p>It all starts in a <a href="http://en.wikipedia.org/wiki/Molecular_cloud" rel="nofollow noreferrer">molecular cloud</a>, which are clouds in space with high densities. They can contain all kind of gases and <a href="http://en.wikipedia.org/wiki/Cosmic_dust" rel="nofollow noreferrer">dust</a> and also due to their densities and relatively low temperatures they also contain molecules like H2, CO2 and H2O. These are in a thermodynamic equilibrium until something disturbs them (usually nearby supernovae). For some reason a zone of this cloud becomes denser and gravity wins to and starts to collapse the cloud until it forms a star.</p>
<p>These molecular clouds can be the remains of dead stars or simply a bunch of gas and dust collected and hold at the high-density zones at the galaxy's spiral arms or around the core.</p>

CC BY-SA 4.0
2014-06-23T06:24:02.940Z
2022-01-03T20:18:32.347Z
2022-01-03T20:18:32.347Z
Joan.bdm
<p>How are stars formed? 
I read somewhere that when dust, gas, rocks etc come close to each other due to gravity, slowly and gradually build up a lot of pressure and form stars. 
If what I read is right, then from where did these materials come from?</p>

<star>
Formation of stars
Aryaman Bansal
# Formation of stars

(Asked by: username_0 on 2014-06-22)

How are stars formed?
I read somewhere that when dust, gas, rocks etc come close to each other due to gravity, slowly and gradually build up a lot of pressure and form stars.
If what I read is right, then from where did these materials come from?

**Tags:** star

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## 1 answers

### Answer by username_1 on 2014-06-23. Score: 4 | Accepted answer

It all starts in a [molecular cloud](http://en.wikipedia.org/wiki/Molecular_cloud), which are clouds in space with high densities. They can contain all kind of gases and [dust](http://en.wikipedia.org/wiki/Cosmic_dust) and also due to their densities and relatively low temperatures they also contain molecules like H2, CO2 and H2O. These are in a thermodynamic equilibrium until something disturbs them (usually nearby supernovae). For some reason a zone of this cloud becomes denser and gravity wins to and starts to collapse the cloud until it forms a star.

These molecular clouds can be the remains of dead stars or simply a bunch of gas and dust collected and hold at the high-density zones at the galaxy's spiral arms or around the core.


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