The mysterious Oort cloud is the source of many of our solar system's comets, but astronomers still have no idea what it ...

New evidence suggests that conditions in the early universe may have shaped star formation in surprising ways.

Caldwell 103 is a treasure of the southern night sky. Also cataloged as NGC 2070 and often called the Tarantula Nebula or 30 Doradus, this chimerical structure is nestled in the Large Magellanic Cloud ...