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Astronomy

TermDefinition
Solar System The Sun and its family of orbiting planets, moons, and other objects.
Star A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion.
Stellar Spectra Continuous black body spectrum and photo-sphere.
Planet A large body in space that orbits a star and does not produce light of its own.
Solar Nebula A rotating cloud of gas and dust from which the sun and planets formed.
Gas Giant A large planet composed mainly of gas.
Nuclear Fusion The process by which hydrogen atoms join together to form helium, releasing energy.
Main Sequence A diagonal area on an H-R diagram that includes more than 90 percent of all stars.
HR Diagram A graph relating the temperature and brightness of star.
Nebular A cloud of gas and dust that is in outer space.
Red Giant A large, reddish star late in its life cycle.
White Dwarf hot, extremely dense core; shine for billions of years; lower left on H-R diagram.
Nova A star that explosively increases in brightness.
Neutron Star The ultimate end of a massive star as a result of a supernova.
Pulsar A rapidly spinning neutron star that emits rapid pulses of radio and optical energy.
Black Hole A place in space that has a gravitational pull so strong that nothing can escape
Created by: MarsDonelli