a red giant
The Cats's Eye Nebula is a perfect example of a planetary nebula. See related link for a pictorial.
Yes, a lot. For example the Cocoon nebula, the North America Nebula, the Pelican Nebula, the Veil Nebula and the Crescent Nebula. In addition to the nebulae, Cygnus has binary stars, exoplanets, the X-ray source Cygnus-X1, etc.
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.
A large glowing nebula is commonly known as an "emission nebula." These nebulae are primarily composed of ionized gas that emits light of various colors, often dominated by red hues from hydrogen. A well-known example of an emission nebula is the Orion Nebula. They play a crucial role in star formation, providing the raw materials for new stars.
nebula
The Stingray Nebula (Hen 3-1357) is a planetary nebula. (The youngest known).
An ionization nebula is typically found in regions where there are hot, massive stars that emit high-energy ultraviolet radiation. These nebulae are commonly located in the spiral arms of galaxies, near star-forming regions or in clusters of young, hot stars.
"The Crab" is a nebula.
a type of 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
The Helix Nebula is a planetary nebula located in the constellation Aquarius, while the Ring Nebula is a planetary nebula located in the constellation Lyra. The Helix Nebula appears more like a disk or helix shape, while the Ring Nebula appears as a ring or donut shape due to its orientation.
Emission nebula glow and reflection nebula reflect the light form other stars