Definitions Flashcards
A large, glowing ball of gas that generates heat and light through nuclear fusion in its core.
a Star
A moderately large flying object that [1] orbits a star, [2] is large enough for its gravity to make it round, [3] has cleared most objects from its orbital path
a Planet
An object that orbits a planet
a Moon
The Sun and all the material that orbits it
our Solar System
A star and any material that orbits it
a Star System
A great island of stars and space, orbiting a common center
a Galaxy
Easily recognizable pattern or group of stars, smaller than a constellation
Asterism
point that’s directly overhead
Zenith
apparent size of an object
angular size
distance an object is above the horizon
altitude
direction that you’re facing; due north is 0 degrees
azimuth