Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Interstellar Cloud

  • William M. Irvine
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_5122-1


The gas and dust in the interstellar medium are distributed in a somewhat clumpy manner, with denser regions referred to as interstellar clouds. The least dense of these are called diffuse clouds or HI (atomic hydrogen) clouds, while denser regions are, naturally, called dense clouds or molecular clouds.

See Also


Atomic Hydrogen Bioorganic Chemistry Dense Region Interstellar Medium Molecular Cloud 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Department of AstronomyUniversity of Massachusetts, Lederle Graduate Research Tower B 619EAmherstUSA