The _________ is everything that exists in space.
An imaginary line that goes through both poles of a planet is an __________.
The start at the center of our solar system is the ______.
A _____ is a huge burning ball of superheated gas.
A ______ is a small planet-like body that orbits the Earth.
Earth's path as it moves around the sun is its ________.
A ______ is a large system of stars, gas and dust.
A _______ is a large object that orbits a star.
The _________ of the moon describes the different shapes that the moon takes.
A _________is when all of the lit side of the moon can be seen from the Earth.
It takes ________ for the Earth to rotate once around it's axis.
Mars is called the _________ because it looks fiery red from Earth.
The sun is made mostly of ________ and Hydrogen.
A star's color tells us how ____ it is.
The outer planets include Jupiter, Saturn, Uranus and __________.
One reason that the seasons change is because Earth is _______ on its axis.