Molecular clouds and protostars

Giant molecular clouds are very cold, thin and wispy– they stretch out over tens of light years at temperatures from 10-100K, with a warmer core
They are 1000s of time more dense than the local interstellar medium, and collapse further under their own gravity to form protostars at their cores

Giant molecular clouds are very cold, thin and wispy– they stretch out over tens of light years at temperatures from 10-100K, with a warmer core