Emission and Reflection Nebulae

An emission nebula is a glowing cloud of interstellar gas. The gas is emitting light of its own accord cause by some stimulus such as a nearby star exciting the gas. A reflection nebula is a cloud of dust and gas that reflects the light of nearby stars.

NGC 7129 ~ The Rosebud Nebula

NGC 2359 ~ Thor's Helmet

M16 ~ The Eagle Nebula

The Horsehead Nebula

The Crab Nebula, M1

Crab Nebula Exploding TimeLapse!

The Crescent Nebula - NGC 6888

M20, The Trifid Nebula

Bubble Nebula