Across
- 4. Planet that rotates on its side
- 5. Planet famous for its prominent rings
- 11. Shape of every planet's orbit
- 13. Type of universe that will expand forever
- 14. Third rock from the Sun
- 15. Spin on one's axis
- 16. Like giant clouds where stars are born
- 17. Light from galaxies moving away appears more red
- 20. Of our local star
- 24. Sunlight reflected by the Moon
- 25. Explosive stellar endings
- 26. Orbit around a central body
- 27. Planet whose day is longer than its year
- 28. Large collection of billions of stars
Down
- 1. Measure of an orbit's deviation from circular
- 2. Solar system's largest planet
- 3. ___'s law relates galaxy distance to recession velocity
- 5. Instrument that analyzes starlight by wavelength
- 6. Type of extremely dense star remnant
- 7. Season of maximum solar heating
- 8. Outermost planet in our solar system
- 9. Icy visitors with glowing tails
- 10. What a meteorite is while traveling through the atmosphere
- 12. The Red Planet
- 18. Study of the universe's origin and evolution
- 19. ___ star (what our Sun will become)
- 21. ___ craters are left by meteorites
- 22. Astrophotographer's camera type
- 23. Solar system's innermost planet