Across
- 4. the layer of the sun’s atmosphere that looks like a halo during an eclipse
- 7. eruptions that occur when the loops in sunspot regions suddenly connect
- 10. remains of a meteor that survives the atmosphere and hits the planet's surface
- 12. tiny asteroid
- 13. reddish loops of gas that link parts of sunspot regions
- 15. the process of growth or increase
- 18. seventh planet from the sun
- 19. not a planet according to the IAU
- 20. the path of a planet around the sun
- 23. the outermost layer of the sun’s interior
- 24. areas of gas on the sun’s surface that are cooler than the gases around them
- 26. shooting star
- 27. began forming 4.6 billion years ago
- 32. a theory of the origin of the solar system
- 33. a 366-day year
- 35. outer planets
- 36. the center of the Sun
- 37. inner planets
- 39. the Earth is the center of the universe
Down
- 1. to spin on an axis
- 2. the joining of hydrogen atoms to form helium
- 3. the rocky leftovers from the formation of planets in our solar system
- 5. to travel in an orbit around the sun
- 6. fifth planet from the sun
- 8. the layer of the sun’s interior where energy is transferred mainly by electromagnetic radiation
- 9. a celestial body that is in orbit around the sun
- 11. time a given astronomical object takes to complete one orbit around another object
- 14. time to revolve once around the galaxy's center
- 16. the Moon has this type of rotation
- 17. the layer of the sun’s atmosphere that gives off visible light
- 21. the Sun is the center of the universe
- 22. returns in 2061
- 25. formed shortly after the Earth
- 28. a stream of charged particles produced by the corona
- 29. third-generation star
- 30. the layer of the sun’s atmosphere that has a reddish glow
- 31. second planet from the sun
- 34. certain time of year
- 38. dirty space snowball