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