Related articles:
Star
Nebula
Red giant
Stellar evolution
Open cluster
Sun
Nucleosynthesis
Binary star
Supernova
Parallax
White dwarf
Interstellar medium
Solar mass
Key terms:
planetary nebulae
ngc
shapes
stellar
central star
agb
gases
helium
reactions
observations
ionize
messier
spherical
nebulosa
astronomers
emitted
telescope
knots
stsci
ejected
distances
open clusters
galactic
remnant
bipolar
very hot
ultraviolet
heavy elements
red giant
continuum
fusion reactions
reaction rate
abundances
eye nebula
elliptical
background stars
massive stars
billion years
gravitational
spectral lines
space telescope
magnetic fields
particles per cm
planetary nebula phase
carbon and oxygen
stellar evolution
asymptotic giant branch
away from the star
outer layers of the star
spectroscopic observations
Search external links cited by footnotes on Wikipedia page Planetary nebula:
|
|