The forces of rotation caused red hot masses of stones to be torn away from the Earth and to be thrown into the ether, and this is the origin of the stars.

— Anaxagoras 428 BC

Bubble In Cassiopea

By marzulloj at Sun, 09/01/2013 - 10:09am

The bubble nebula in Cassiopea, also known as Caldwell 11.

Two hours H Alpha exposure through a 5" refractor and Starlight express CCD camera.

Bubble In Cassiopea