Across
- 4. matter that does not give off electromagnetic radiation but is quite abundant in the universe
- 5. all of space and everything in it
- 6. the observation that the further away a galaxy is, the faster it is moving away
- 8. what was the apparent change in position of an object when seen from different places
- 14. what is the small, dense remains of a high-mass star after supernova
- 16. what is the blue-white hot core of a star that is left behind after its outer layers have expanded and drifted out into space
- 17. one of the small asteroid-like bodies that formed the building blocks of the planets
- 19. the brightness of a star as seen from earth
- 22. what is the tendency of an object to resist any change in its motion
- 24. the distance that light travels in one year, about 9.5 million, million kilometers
- 25. the spinning motion of a planet on its axis
- 26. a streak of light in the sky produced by the burning of a meteoroid in Earths atmosphere
Down
- 1. an enormously bright, distant galaxy with a giant black hole at its center
- 2. the brightness a star would have if it where at a standard distance from earth
- 3. is a huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity
- 7. an object whose gravity is so strong that nothing, not even light, can escape
- 9. the movement of an object around another object
- 10. an imaginary pattern of stars in the sky
- 11. what was the brilliant explosion of a dying supergiant star
- 12. what is a model of the solar system in which the earth and the other planets revolve around the sun
- 13. the study of the moon, stars, and other objects in space
- 15. what was the initial explosion that resulted in the formation and expansion of the universe
- 18. the force that pulls objects torward each other
- 20. a contracting cloud of gas and dust with enough mass to form a star
- 21. a meteoroid that passes through the atmosphere and hits earths surface
- 23. a chunk of rock and dust in space