Across
- 1. these occur due to revolution of Earth and tilt of Earth’s axis (when we lean in, angle of insolation is high so it's hot and when we lean away, angle of insolation is low so it's cold)
- 3. a cluster of billions of stars that can be either spiral, elliptical, or irregular
- 4. the name of our galaxy
- 9. all objects that revolve around a star (includes planets, Moons, asteroids, comets, meteors, etc.)
- 12. _____ eclipse, which happens when the Full Moon is blocked out by Earth’s shadow
- 14. these are caused by the gravity of the Moon and Sun
- 16. _____ eclipse, which happens when the Sun is blocked out by the New Moon
- 17. the shape of orbits, which are between perfectly round and perfectly straight; their velocity changes because of this shape
- 18. an object spinning on its axis (for example, the Earth spins from West to East once every 24 hours)
- 19. when an object is closest to what it's revolving around (for example, Earth is closest to sun on January 4)
Down
- 2. the process that energizes stars; will continue until fuel runs out
- 5. an object that revolves around a star, is large and spherical (there are 8 classified as planets in our solar system)
- 6. today's accepted model of the Universe, in which the Sun is in the center
- 7. known as "Dirty Snowballs," their tail always extends away from the Sun
- 8. a measure of how far east or west of the Prime Meridian you are
- 10. a giant ball of gas undergoing nuclear fusion
- 11. an object’s motion around another object (for example, the Earth revolves around the Sun once every 365 days)
- 12. a measure of how far north or south of the equator you are
- 13. when an object is the farthest from what it's revolving around (for example, Earth is farthest from the Sun on July 3)
- 15. includes everything (all matter and energy); it is 13.7 billion years old and formed from the Big Bang