Molecular cloud
Molecular cloud is a dense region of the interstellar medium composed primarily of molecular hydrogen, along with dust and trace molecules. It is associated with low temperatures and high densities relative to surrounding space.
Molecular clouds are discussed in astrophysics, galactic astronomy, and studies of star formation.
Status
Molecular clouds are observed through radio and infrared measurements, including molecular line emission and dust absorption. Their internal structure, dynamics, and role in regulating star formation remain active areas of research.