The Pencil Nebula (or NGC2736) is part of the Vela Supernova Remnant, located near the Vela Pulsar in the constellation Vela.
It is called "pencil" because of it's linear appearance.
See related link for a picture.
The Crab Nebula is a nebula.
Triffid Nebula, Eagle Nebula, Cat's Eye nebula
A solar nebula is related to the formation of our Solar System, any other nebula is just a nebula.
nebula
The Stingray Nebula (Hen 3-1357) is a planetary nebula. (The youngest known).
a type of nebula
"The Crab" is a nebula.
A cloud in outer space consisting of gas or dust and planetry nebula is one of the types also called ring nebula or A planetary nebula is an emission nebula consisting of a glowing shell of gas
Emission nebula glow and reflection nebula reflect the light form other stars
The crab nebula.
orion nebula
The eye of god is a Helix nebula. Close to a Planetary nebula.