Chitral Astronomical Society
Skies over the Hindu Kush
Star
A hot, massive, ferociously luminous star.
Spectral type O or B supergiant with surface temperatures of 10,000–50,000 K. Examples: Rigel, Deneb. Lifetimes only a few million years.
See also
Blue Giant
A massive, very hot luminous star.
Vega
The summer beacon, future pole star.
Altair
The flying eagle — fastest-spinning bright star.
Red Giant
A bloated, cool, ageing star.
Hypergiant
The most luminous and unstable stars in the cosmos.
Red Dwarf
The most common — and longest-lived — kind of star.
