Astronomy Crossword Puzzle

Is the branch of science that studies objects beyond the earth
The study of the universe
Is everything that exists, including all energy, matter and space
Any object in space
They are a massive collection of gases held together by their own gravity and emitting huge amounts of energy
This means they produce and emit their own light
A large celestial object that revolves around a star and are non-luminous
Reflects but does not emit light
Consists of the sun and all celestial objects that revolve round it (planets, moons, asteroids, comets)
Is a celestial object that revolves around a planet in a closed path or orbit
Is a huge, rotating collection of gas, dust and billions of stars, planets and other celestial objects
Jupiter, Saturn, Uranus and Neptune are the outer planets known as the _______ _________ because they are composed mainly of gases and liquids
Mercury, Venus, Earth and Mars are the inner planets known as the ___________ __________ because they have a solid rocky core