Solar System Vocab

4. The amount of gravitational pull between two objects.
6. A collection of stars and their solar systems that are gravitationally bound to one another.
9. A scientist who studies objects and events beyond Earth’s atmosphere, such as the movement of stars and planets.
11. A star and all of the objects that orbit it.
13. A sequence of events that repeats.
14. The different shapes of the Moon visible from Earth.
16. A push or a pull.
18. A natural phenomenon that causes objects to be attracted to each other based on each object’s mass and the distance between them.
19. The mixture of gases that surrounds a planet.
21. Information that supports or refutes a claim.
22. When the Moon passes between Earth and the Sun such that the Moon’s shadow causes some places on Earth to experience darkness during daytime.

1. When the Moon passes into Earth’s shadow.
2. A flat two-dimensional plane where a space object is at any point in its orbit.
3. The angle of Earth’s axis(approximately 23.5 degrees from perpendicular) relative to Earth’s orbital plane around the Sun.
5. The amount of matter in an object.
7. A desirable outcome given up to gain another desirable outcome.
8. The imaginary line around which an object spins, or rotates.
10. Rockets, satellites, probes, space stations, and space shuttles that carry various tools and equipment to gather data about space and space objects.
12. The ratio of the size of a real object to the size of a model, map, diagram, or other representation of that object.
15. the mean, or average, distance between Earth and the Sun.
17. Something that happens in a repeated and predictable way.
20. Any description or measurement gathered by the senses or instruments.
23. A curved path that a space object takes around a star, planet, or moon.