Across
- 2. Centaurus A is an example of this type of galaxy
- 5. an isolated collection of stellar and interstellar matter held together by its own gravity
- 6. clouds of interstellar gas and dust
- 7. when the Earth and Sun and Moon line up
- 9. the innermost layer of Earth’s interior
- 13. a clump of galaxy clusters
- 15. we can only see this when a neutron star is oriented the right way
- 17. what began to dominate over radiation when the Universe was tens of thousands of years old
- 18. probe that survived an hour on Jupiter in 1995
- 20. the same in all directions
- 21. what type of evolution is a continuous process that has led to the appearance of galaxies, stars, planets, and life on Earth
- 25. a way to describe constellations that are always visible
- 26. fluctuations in ocean level caused by gravitational interactions between the Sun and Moon and Earth
- 27. the bending of light waves
- 30. type of star 100 times larger than our Sun
- 31. a famous comet visible from Earth at regular intervals
- 33. Saturn’s largest moon
- 34. ball of gas held together by its own gravity with nuclear fusion happening in its center
- 35. the big round regions where the largest volcanic structures on Venus can be found
- 36. the continuous force that keeps our feet on the ground
Down
- 1. the dense object at the center of a contracting interstellar cloud
- 2. the type of telescope preferred by astronomers for its lightness and ease of construction
- 3. form of life that thrive in the most hostile environments
- 4. what interstellar debris is called when it goes through the atmosphere and makes contact with the ground
- 8. a device that collects distant light and directs it to detectors for observation
- 10. the most luminous object known to us
- 11. icy dwarf planets beyond Neptune
- 12. planet in our solar system that has an extremely tilted axis
- 14. stars similar in size to our Sun
- 16. the speed of ____ represents the fastest speed possible for any particle
- 19. type of dwarf star that happens when white dwarfs cool and fade
- 20. an object in motion stays in motion
- 22. most recent rover on Mars
- 23. mergers between spirals most likely result in this type of galaxy
- 24. the type of flat disc galaxy ours is
- 28. lower atmosphere layer of the sun
- 29. a particle of electromagnetic radiation
- 32. explosions that result from the biggest stars evolving quickly and releasing heavy elements they make