The process by which two or more small nuclei fuse to make a bigger nucleus
The process by which a large nucleus is split into smaller nuclei
The amount of isotope necessary to sustain a chain reaction
The brightness of a star, corrected for distance, aon a scale of -8 to +19. The smaller the number, the brighter the star.
The brightness of a star as seen in the night sky. The smaller the number, the brighter the star.
The distance light could travel along a straight line in one year
A large ensemble of stars, all interacting through the gravitational force and orbiting around a common center