1,000,000 K
no
A Planetary Nebula. See related question.
planetary
No, they are ionized gases thrown off stars near the end of their fusion cycles. They are expanding clouds of matter, quite different from the nebulae in which stars form.
Some, but not all, are round and spherical. However, most are dumbell shaped, or more commonly dubbed, bipolar.
Planetary Nebulae
no
no
Timothy Barker has written: 'The ionization structure of planetary nebulae' -- subject(s): Planetary nebulae
Yes. There are many planetary nebulae in our galaxy.
The galaxis are bigger than planetary nebulae, that are bigger than planetary systems.
Planetary nebulae (the cat's eye nebula) Emission nebulae (the orion nebula) Dark nebulae (the horsehead nebula) Supernova remnant nebulae (the crab)
a nebula is classified by a planetary nebulae
Slow down 9JFR
i don't konw?
A Planetary Nebula. See related question.
Mostly in planetary nebulae where a star that was big enough to produce oxygen when it exploded is.