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astronomy vocab pt 2

TermDefinition
photosphere a luminous envelope of a star from witch its light and heat radiate
chromosphere layer of gas above the photosphere of the sun
corona a gaseous envelope of the sun and other stars
solar wind a flow of continuous changed partials from the sun
sunspot a patch that appears on suns surface from time to time darkened by surroundings
prominece the condition of something
solar flare a brief eruption of high energy radiation from suns surface
nuclear fusion a nuclear reaction that releases energy
constellation a group of stars forming a pattern
binary star two stars in witch one revolves around the other
light year the distance that light travels in one year
apparent magnitude magnitude of celestial object as accurately measured from earth
absolute magnitude the magnitude of an object as seen from standard distance
main sequence star a star that is fused with hydrogen from the core
red giant a very large star with a low surface tempature
supergiant very large star that is brighter than a giant
nova a star showing large increase in brightness then returning to normal state over time
Hertzsprung-Russell diagram two dementional graph that shows absolute magnitude of stars
protostar contracting gas that represents early stage in the formation of a star
supernova a star that suddenly increases in brightness
white dwarf small very dense star that is typically the size of a planet
neutron star small star with very high density
black hole a region of space that has a gravitational field so intense nothing can escape
galaxy millions and billions of stars together with gas and dust and held together by gravity
big bang theory a theory that the universe originated billions of years ago by an explosion
Created by: 3143305
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