Across
- 3. the pull between Earth and other objects
- 5. to move in a regular path around something
- 9. the only star in our solar system
- 11. an arrangement of stars as seen from Earth
- 12. a description of how something works or why something happens
- 14. observations or measurements recorded in an investigation
- 15. the length of time it takes for Earth to orbit the sun once
Down
- 1. an attempt to find out about something
- 2. information that supports an answer to a question
- 4. a scientist who studies stars, planets, and other objects in the universe
- 6. system the sun, the planets that orbit the sun, and other objects that orbit the sun
- 7. a period of time that is 24 hours long and includes daytime and nighttime
- 8. something scientists make to answer questions about the real world
- 10. a huge object in space that gives off heat and light
- 13. something we observe to be similar over and over again
