Across
- 2. A celestial body resembling a small planet but lacks criteria for it to be classed as such
- 3. Meteors that hit Earth’s surface
- 7. A rapidly spinning neutron star emits radio and optical energy pulses
- 8. These stars end their lives by ejecting a planetary nebula and becoming a white dwarf
- 11. The location on the H-R diagram where most of the stars lie
- 14. A star that is much larger than a Sun-like star; will blow up in a supernova and end as a neutron star or black hole
- 15. The distance that light travels in one year.
- 17. A large cloud of dust and gas in space where stars are made
- 19. An object that orbits a star and is large enough to have become rounded by its gravity.
- 21. Pieces of asteroids that have broken off and continue a path through space
- 22. A force of attraction between objects that is due to their masses
- 23. The star at the center of our solar system.
- 24. The distance between two corresponding points on a wave
- 25. The brightness of a star when viewed from Earth.
- 27. A ball of frozen dust and rock that orbits the sun and has a tail that glows
- 28. The top of the wave
- 31. Large celestial bodies composed of rock and metal that move around the sun
- 32. Any natural object outside of Earth’s atmosphere
- 33. Space and all the matter and energy in it.
- 34. A huge group of single stars, star systems, star clusters, dust, and gas bound planets held together by gravity.
- 37. Areas throughout the universe where very little matter exists.
- 38. A tiny star that remains after a supernova explosion
Down
- 1. A gigantic explosion in which a massive star collapses and throws its outer layers into space.
- 4. Planets that have compact, rocky surfaces that are close to the sun
- 5. An object in space whose gravity is so strong that not even light can escape
- 6. A region of the solar system beyond the planets that contain many comets, asteroids, and other small bodies made largely of ice.
- 9. The sun, planets, and all the other objects that evolve around the sun.
- 10. The actual brightness of a star
- 12. The region of the solar system between the orbits of Mars and Jupiter, where many asteroids are found
- 13. A huge, bright ball of burning gas held together by gravity.
- 16. Large, gaseous planets that are very cold at their surfaces, have ring systems, many moons, and lack surfaces
- 17. The process by which hydrogen atoms join together in the sun's core to form helium and bigger elements
- 18. A natural object that orbits a planet
- 20. The name of our galaxy, a spiral galaxy that contains about 400 billion stars.
- 21. A meteoroid that enters Earth’s atmosphere
- 25. A measure of how bright a star would be if all stars were at the same distance
- 26. A small, hot, dim star that is the leftover center of an old star
- 29. The bottom of the wave
- 30. Two or more stars bound together by gravity which causes them to orbit each other
- 35. A spherical region of comets and other icy objects that surrounds the solar system
- 36. A graph relating the temperature and brightness of stars