An orbit is the circular or elliptical motion of one smaller body around another larger body due to gravitational attraction.
In physics and astronomy, a star is a huge globe of plasma that emits its own radiation.
Out in the universe there is an immeasurable amount of space.
A star is any hydrostatically stable plasma that generates heat and electromagnetic radiation by nuclear fusion.
Astronomy
There is a branch of astronomy called planetary astronomy that takes geology and uses it to examine other planets, so yes rocks are studied in astronomy.
orbit
In physics and astronomy, a star is a huge globe of plasma that emits its own radiation.
communication satellites, astronomy, navigation, etc.
Out in the universe there is an immeasurable amount of space.
In astronomy, a cluster is a large group of celestial bodies such as stars or galaxies.
Rotation is the circular motion of a body around a central axis.
Correct answer= "satellite"
· orbit · ozone, maybe Orion Oort cloud
path that repeats itself and never ends
Nicolaus Copernicus
A day is defined as the time it takes a planet to make one rotation on it's axis.
A galaxy is a vast self-gravitating structure of interstellar matter, energy, and forces.