Cave Nebula (Caldwell 9)
The Cave Nebula is an emission nebula located approximately 2,400 light-years away in the northern constellation Cepheus. With an apparent magnitude of 7.7 and an… Read More »Cave Nebula (Caldwell 9)
The Cave Nebula is an emission nebula located approximately 2,400 light-years away in the northern constellation Cepheus. With an apparent magnitude of 7.7 and an… Read More »Cave Nebula (Caldwell 9)