Across
- 3. something artificially put into Earth's atmosphere by humans
- 4. the largest planet in our solar system
- 6. a small body floating around in space
- 8. The empty void that holds everything
- 11. the universal force of attraction acting between all matter
- 12. spheroid of Plasma that is held together by it's own gravity
- 13. Pluto is a ______
- 18. a gravitational bound system between our planets and the sun
- 22. a person whose job is to go into space
- 23. a small body in Earth's atmosphere
- 25. the galaxy that includes our solar system
- 26. the distance light travels in one year
- 27. the study of everything outside of Earth's atmosphere
- 28. the international space station
Down
- 1. a region of space between the orbits of Mars and Jupiter
- 2. a gravitational bound system between solar systems
- 5. an icy body in Earth's atmosphere
- 7. an optical instrument designed to make distant objects appear nearer
- 9. this planet is considered a dwarf planet
- 10. the planet that we live on
- 14. last name of the first man on the moon
- 15. a large body in Earth's atmosphere
- 16. the fourth planet from the sun
- 17. Earth is a _____
- 19. the closest star to Earth
- 20. the first spacecraft to carry humans to the moon successfully
- 21. the planet in our solar system with what looks like a ring around it
- 24. a solid piece of debris from an object, such as a comet, asteroid, or a meteor