NGC 1499, known as the "California Nebula" due to its resemblance to the shape of California, is a luminous nebula emitting light in various wavelengths. It stretches about 100 light-years (1 ...

The Iris is a reflection nebula, a cloud of gas and dust illuminated by a central star. It's six light-years across, and lies 1400 years away from the earth. The Eagle Nebula is a young open cluster ...

Andromeda nebula plate with Hubble's handwritten circle around the variable star he discovered In 1919 American astronomer Edwin Hubble began work at the Mount Wilson Observatory in California ...