Anatomy of Milky Way’s Star Creation -Occurs in Skeletal Light-Years-Long Filaments 

Milky Way Galaxy Bones

 

The opening episode of star formation in the Milky Way occurs in long, dense filaments of gas and dust. These massive galactic endoskeletons seen in other galaxies, dubbed “bones,” to use an anatomical term, stretch along the spiral arms. These filaments delineate the galaxy’s densest skeletal spiral structures –characterized by being at least fifty times longer than they are wide and having coherent internal motions along their lengths. (more…)