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15 Cards in this Set

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A group of stars that form a pattern of a PERSON, ANIMAL, or THING
Constellation
A star that "doesn't move" in the sky, the constellation used to find it
Polaris,
Big Dipper
A telescope using a lens,
A telescope using a mirror
Refracting,
Reflecting
Something that seperates light into bands of color
Spectroscope
4 things this instrument (S) tells us about stars
Make-up, direction of movement, speed, distance
2 units astronomers use to measure distance
Light years, parsec
3 ways astronomers measure distance in space
Spectroscope, Cephid Variables, parallex
Comparitive brightness as seen by the observer/seen from the same distance/true brightness
Apparent,
Absolute,
Luminosity
True brightness depends on
Heat and size
The color of a star can tell the stars
Heat
In the HR diagram most stars are in the
Main Sequence
Stars that are hot but not bright and stars that are cool but bright
Red Giant,
White Dwarf
The life-time of a star depends on its
Mass
The end of the life of a massive star when it explodes and a very massive star after the explosin
Supernova,
Black Hole
A variable star that expands and contracts and a nuetron star that sends radio waves
PulsaTING,
PulsaR