Deep-Sky Object
Molecular Cloud
A cold cradle where stars are born.
Dense, cold (10–20 K) regions where hydrogen exists as H₂ molecules along with CO and dust. Gravitational collapse here forms new stars.
Overview
Dense, cold (10–20 K) regions where hydrogen exists as H₂ molecules along with CO and dust. Gravitational collapse here forms new stars.
See also
Dark Nebula
A cold cloud blocking the stars behind it.
H II Region
A nursery of stars wrapped in ionised hydrogen.
OB Association
A loose group of hot massive stars.
Stellar Association
A loose grouping of young related stars.
Open Cluster
Gravitationally associated group of stars sharing a common origin.
Globular Cluster
Gravitationally associated group of stars sharing a common origin.