The Butterfly Nebula
Lying in the Milky Way Galaxy, The Butterfly Nebula stretches for more than two light-years, which is about half the distance from the Sun to the nearest star, Alpha Centauri.
The Helix Nebula
The Helix is an example of a planetary nebula, the expanding shell of glowing gas around a dying, Sun-like star. If seen through a telescope, this nebula looks like a huge eye.