Across
- 1. The process where new atoms are created.
- 4. Tilt is the reason Earth has these.
- 7. The series of steps a star goes through during its life: Stellar ___.
- 10. Good for measuring distances between stars/galaxies (2 words).
- 11. Good for measuring distances between planets (2 words).
- 15. When a planet is closest to the Sun.
- 16. Measurement of how bright a star is; lower numbers are brighter.
- 18. He figured out the Sun was in the center of the solar system.
- 20. Squeezing two atoms together; the reaction pushes a star outward.
- 22. Measurement of how much energy is given off by a star.
- 23. The model where the Sun is in the center of the solar system.
- 25. Fancy name for a cloud of dust and gas; our star will be this after its red giant stage.
- 26. The force that pulls a star inward, compressing it.
- 27. King of the planets with a huge red spot.
- 28. Season in Iowa when we are tilted away from the Sun.
Down
- 2. While all the gas giants have rings, this one has the best set.
- 3. One lap around the Sun.
- 5. The "pattern" of colors given off by stars and elements.
- 6. One ___ is equal to one day on a planet.
- 8. This element is fused inside of a star to make helium.
- 9. Model that explains how the universe might have came to be (2 words).
- 11. Position when a planet is farthest away from the Sun.
- 12. A huge "explosion" in space; happens only with super-sized stars.
- 13. Name for planets with rocky, solid surfaces.
- 14. A model where Earth is in the center of the solar system.
- 15. Was "disqualified" when the definition of "planet" changed.
- 17. Since galaxies are moving away from us, their spectra is ___.
- 19. The ONLY place we know of that has life on it.
- 21. Season in Iowa when we are tilted towards the Sun.
- 24. Generic term used to describe when an object blocks the Sun.