Space Systems Crossword

5. The sun appears to move across the sky because the Earth is _____________
7. March 21 of each year marks the spring _______________
11. The push or pull of an object that results in the object interacting with another object
12. If you increase the ___________ between objects, the gravity gets weaker
13. An invisible force that pulls objects closer together
14. The Earth travels in this path around the sun. It takes 365 days to complete it.
15. What is the general term for a moon, planet, or machine that orbits a planet or star?
16. The ___________ brightness is the magnitude of the brightness of a star as it is seen from Earth

1. Groups of stars that we have given names and imaginary images
2. The amount of energy a star creates is called the True ____________
3. What do we call stars that always stay above the horizon all year long?
4. We have seasons because the Earth is ________
6. An imaginary straight line through an object that spins. Earth has one of these
8. The force between two surfaces that are sliding across each other
9. If an object has more ________ it has more gravity
10. Would a shadow appear longer or shorter when the sun is low in the sky?