Astronomy View all facts Glossary Help| Astronomy View all facts Glossary Help |
| physical object > natural object > collection of particles > phase of matter > gas > interstellar gas |
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| interstellar gas comparison table | ||||
| Subject | has composition | has definition | has density | is a kind of |
|---|---|---|---|---|
| gas | The gaseous component of a galaxy, includes nebula | phase of matter | ||
| interstellar gas | mainly hydrogen | Sparse, cool gas (mainly hydrogen) in interstellar space. Dust absorbs and scatters radiation; gas does not interact directly with radiation but is coupled to the dust by collisions. Interstellar gas affects only light of certain wavelengths. Temperature 10-100 K. | very low | gas |