Astronomy: The scientific study
of the Galaxies, Stars, Nebulae, Solar Systems and the
Universe. It deals with a celestial objects
relationship to the Earth, size, position,
composition, motion, evolution and energy.
Astronomers use telescopes, satellites,
computers, space stations and observatories to
study the universe. Astronomer:
A person who studies the Stars, Comets, Meteors,
Asteroids, Planets, Moons, Solar Systems,
Galaxies, and the Universe.