The location of the nebula is in many places because the nebula exists in different constellations. A nebula is a cloud of interstellar dust.
a protostar
Orion
Triffid Nebula, Eagle Nebula, Cat's Eye nebula
A nebula does not directly turn into a white dwarf. A nebula will collapse to form stars. Low to medium mass stars become white dwarfs after they die. Some are the result of a supernova and do not collapse, they merely dissipate over time. The Crab Nebula is the most prominent example of this.
"Pillars of Creation"
The famous Ring Nebula in the Lyra (M57 or NGC 6720) is a planetary nebula. All details in http://www.astrocruise.com/m57.htm
The location of the nebula is in many places because the nebula exists in different constellations. A nebula is a cloud of interstellar dust.
The crab nebula is the debris formed in the supernova explosion.
Most known is very subjective, but the three best known for me are:Horsehead NebulaCrab NebulaCat's Eye Nebula
a protostar
You can find a Nebula just about anywhere in space. They are big floating masses of dust and gas that form stars.
Nebula used to be the most powerful fairy, but when Bloom came, she became weak.
Orion
The Crab Nebula is a nebula.
gravitational pull of nebula materials on each other
most of the times a planetary nebula lives for 5,000 years