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12 Cards in this Set

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Absolute Magnitude

brightness of star as seenfrom 32. 6 light years from the earth


Apparent magnitude


brightness of star as seen fromearth


Circumpolar


any star always visible inthe night sky


Constellation

Pattern of stars

H-R Diagram

shows the relationship between surface temperature and theabsolute magnitude of a star


Light-year


Distance light travels in one year

Main-sequence star--


stars that run through themiddle of the H-R diagram


Neutron star--


collapsed core of a supernova that is very dense, 100million tons per spoonful of matter


Parallax


Method of determining thedistance from the earth to the a star based on the shift in apparent positionof the star when viewed from different angles


Pulsar


a spinning neutron starthat emits two beams of radiation across space


Red-Shift

apparent lengthening of thelight waves emitted by a star moving away from the earth


Star

body of gases that givesoff tremendous amount of radiant energy in the form of light and heat