Across
- 1. travel, trip
- 4. information we collect through research
- 6. a very large group of stars and planets
- 8. the place beyond the earth's atmosphere
- 9. a star and some planets
- 11. it moves around the sun
- 12. everything we can touch, feel, sense, measure or detect. It includes living things, planets, stars, light, and even time
Down
- 2. moving around something
- 3. something that does not belong to earth
- 5. to discuss a question by considering opposed arguments
- 7. the whole mass of air surrounding a planet
- 10. it is made of ice and dust and it often has a tail