White Dwarf
Red giant, then a planetary nebula, then a white dwarf.
The Cats's Eye Nebula is a perfect example of a planetary nebula. See related link for a pictorial.
Earth's sun is currently a main sequence star which has a small mass. Eventually it will expand into Red Giant star once the core runs out of hydrogen and then helium gas. After the Red Giant phase, the star throws off its outer layers and then becomes a planetary nebula. A sun-like star will either become a white dwarf or black dwarf following the planetary nebula.
A planetary nebula is created by a dying low to medium mass star as it sheds its outer layers of gas.
They explode as a supernova/hypernova to form a planetary nebula/black hole.
A planetary nebula consists of gas ejected from old red giant stars.
planetary nebula
planetary nebula
Typically it is called a planetary nebula. It has nothing to do with planets.
Red giant, then a planetary nebula, then a white dwarf.
Planetary nebula is a misnomer because it's a nebula but it has nothing to do with planets, it's about stars.
The Cats's Eye Nebula is a perfect example of a planetary nebula. See related link for a pictorial.
A star like our sun will shed a planetary nebula after its 'death'
a nebula is classified by a planetary nebulae
Planetary nebula is a misnomer because it's totally irrelevant to planets and it has something to do with stars. The short form is "nebula".
After a planetary nebula the oxygen in the middle will make it turn into a blackhole or neutron star.
a planetary nebula forms after a hsb o3iii