A binary star. The main component is a Be-type subgiant.
No kind of star.
A star
A star
star
It is a binary star
the oldest star is a red colored star
Negative neutron star
a meteor is NOT a star it is a bit of rock
Pulsars are not only a kind of neutron star, they are neutron stars. See related question.
Earth isn't a star... It is a terrestrial planet.
The spectrum is a kind of analysis of the light emitted by a star.
A degenerate star or stellar remnant.