What is the relationship between the Earth, the moon and the Sun?
•    How do things move in space?
•    Are all the planets the same?
•    What moves through our Solar System?
•    What else is in our universe?
•    Can life be sustained in space?

Statements of Understandings
•    The Earth is a part of a system of planets orbiting around a star.
•    The planets in our Solar System have different properties.