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Apologia Module 16

An Introduction to Astrophysics

QuestionAnswer
Nuclear fusion The process by which two or more small nuclei fuse to make a bigger nucleus
Nuclear fission The process by which a large nucleus is split into smaller nuclei
Critical mass The amount of isotope necessary to sustain a chain reaction
Absolute magnitude The brightness of a star,corrected for distance,on a scale of -8 to +19.The smaller the number,the brighter the star
Apparent magnitude The brightness of a star as seen in the night sky.The smaller the number,the brighter the star
Light year The distance light could travel along a straight line in one year
Galaxy A large ensemble of stars,all interacting through the gravitational force and orbiting around a common center
Created by: Makenshi on 2010-04-30



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