Across
- 3. Matter that does not interact with the electromagnetic force of our universe; one of three main things our universe is composed of
- 11. Uppermost layer of our suns atmosphere
- 12. How astronomers explain the way the universe began
- 13. The rapid growth of our universe; evidence of how our universe started
- 15. Outermost layer of our suns interior where light is created
- 16. An enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars
- 17. A constellation resembling a hunter
- 18. Visible lower layer of our suns atmosphere
- 19. A hypothetical form of energy that produces a force that opposes gravity and is thought to be the cause of the accelerating expansion of the universe; one of three main things our universe is composed of
- 21. Galaxy type that ranges from completely round to oval in shape
- 24. A huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity
- 25. The distance light travels in one Earth year
- 26. The splitting of the nucleus of a heavier atom into a smaller one, releasing a tremendous amount of energy
- 30. The second interior layer of our sun where energy generated by nuclear fission in the core moves outward
- 31. Galaxy type that does not have a distinct shape
- 32. Our home galaxy
- 34. A small, icy object that orbits the central star of a solar system and has a long "tail" of gas
- 40. 1st stage in the life cycle of an average star
- 41. A solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or moon
- 45. 8th event in our universes timeline
- 46. 5th and final in the life cycle of an average star
- 47. 6th event in our universes timeline
- 49. Galaxy type that resembles a giant rotating pinwheel and has many arms; the shape of our home galaxy, the Milky Way
- 50. 1st event in our universes timeline; the point where our universe started
- 51. A small, rapidly moving meteor burning up on entering the earth's atmosphere
- 53. A constellation resembling a little spoon
Down
- 1. A constellation resembling a little bear
- 2. 3rd stage in the life cycle of an average star
- 4. Age of our universe
- 5. A constellation resembling a great bear
- 6. The center of our sun where nuclear fission occurs
- 7. A celestial body in orbit around a star
- 8. An explanation for occurrences in the natural world formulated by using the scientific method
- 9. 4th stage in the life cycle of an average star
- 10. It includes all of space, and all the matter and energy that space contains; started with the big bang
- 14. An intense burst of radiation coming from the release of magnetic energy associated with sunspots
- 15. Most intense geomagnetic storm in recorded history
- 20. A natural luminous body visible in the sky especially at night
- 22. The brightest star we can see
- 23. The cycle that the Sun's magnetic field goes through approximately every 11 years
- 27. An area of such immense gravity that nothing—not even light—can escape from it
- 28. A large round object that orbits a planet
- 29. 7th event in our universes timeline
- 33. 2nd stage in the life cycle of an average star
- 35. 3rd event in our universes timeline
- 36. Lumps of rock or iron that orbit the central star of a solar system
- 37. Anything that makes up space and can be weighed; One of three main things our universe is composed of
- 38. Background radiation distributed throughout our entire universe; evidence of how our universe started
- 39. A space rock that enters earth's atmosphere causing a streak of light to appear in the sky
- 42. Small, rocky objects that orbit the the central star of a solar system
- 43. 5th event in our universes timeline
- 44. Orange-red layer of our suns atmosphere
- 48. 4th event in our universes timeline
- 52. A constellation resembling a big spoon