... M31: The Andromeda Galaxy . ... Andromeda is the nearest major galaxy to our own Milky Way Galaxy. ... The diffuse light from Andromeda is caused by the hundreds of billions of stars that compose it. ... The Bubble . ... Astronomer Ken Crawford's striking view combines a long exposure through a hydrogen alpha filter with color images to reveal the intricate details of this cosmic bubble and its environment. ... Orion Nebula in Oxygen, Hydrogen, and Sulfur . ... Cassini Images Saturns A Ring . ...