Structure and Motion in the Solar System

1. Moon
4. an object that orbits the Sun and if big enough to be round but doesnt clear away all objects near its orbit
10. the path an object takes to travel around another object
13. the amount of matter that is in something
15. a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force
17. the average distance between an object and the object it is orbiting
19. the distance light travels in 1 year. About equal to 9.5 trillion kilometers
20. an object that orbits a star and is massive enough for its own gravity to force it into a spherical shape
21. when the Moon is farthest from Earth
23. the area around the Earth extending out to just beyond the Moons orbit. This includes all 5 Lagrange points
25. when the Moon passes excatly between Earth and Sun

2. an abject that naturally orbits around another
3. spinning on an axis
5. a large planet mostly composed of helium and/or hydrogen. These planets, like Jupiter and Saturn in our solar system, don’t have hard surfaces and instead have swirling gases above a solid core.
6. an extremely dense cosmic object that can form after a star becomes a supernova
7. a force of attraction between two masses
8. a day of the year when Earths North Pole is leaning either toward the Sun or away from the Sun
9. when Earth is exactly between the Moon and the Sun, and the Moon passes through the Earths shadow
11. the stage of a star when it becomes very large and had a relatively cool surface
12. when the Moon is closest to Earth
14. sun
16. 5 points in space where objects sent there tend to stay put.
18. an imaginary axle that a planet spins on
22. when a person, place or thing is in a sloped position
24. 3 dimensional space and time are woven together into a single thing.