Across
- 3. the planet that is the farthest away from the sun
- 5. a group of millions or billions of stars held together by their own gravity
- 6. small, solid, rocky bodies that orbit close the sun
- 8. technical name for the "North Star"
- 10. the largest planet in the Milky Way galaxy
- 12. the hottest planet in the Milky way Galaxy
- 14. huge loops of glowing gas that extend into the corona
- 15. a group of stars that form a pattern in the sky
- 18. a wide, flat zone of small particles that orbits a planet
- 20. the closest planet to the sun
Down
- 1. Station a satellite that people can live inside and work inside for long periods
- 2. a cloud of gas and dust where stars form
- 3. Star an extremely dense body that forms from the collapsed core of a supergiant star
- 4. the part of the sun that is visible to the unaided human eye
- 7. Hole an invisible object that has an extremely large amount of gravity that light can't even escape from
- 9. Units the distance from the earth to the sun
- 11. everything in space and all the matter and energy in it
- 13. Bang the moment in time when the universe started to expand
- 16. the distance light travels in a year
- 17. the path of an object in space as it moves around another object because of gravity
- 19. Wind electrically charged particles that flow out in every direction from the corona