What are interstellar clouds called when they are cold enough to form molecules?
Answer
Molecular clouds
Molecular clouds are the specific term for interstellar clouds that have cooled sufficiently to allow molecules, primarily molecular hydrogen, to form, marking them as the nurseries of galaxy star formation.
Related Questions
What are interstellar clouds called when they are cold enough to form molecules?What primary process must gravity overcome for cloud collapse to begin?Which force is identified as the most significant non-thermal pressure source resisting collapse in large, cold clouds?What physical condition mathematically describes whether a cloud will collapse under its own weight?If a region within a cloud possesses a mass greater than its Jeans Mass ($M_J$), what is the guaranteed result?How does cooling affect the Jeans Mass ($M_J$) relationship within a molecular cloud?What usually triggers the initial instability in a cloud that might otherwise be stable overall?What is the primary role of external events like colliding molecular clouds?How does the process of gravitational collapse affect the structure of the initial large cloud?What typical outcome results from the hierarchical fragmentation of collapsing cores?