Across
- 3. A scientist who studies celestial objects
- 14. Essential or basic
- 15. to To result in or cause something
- 16. A tool or device for a particular purpose
- 17. A manmade or natural object that orbits a planet
- 18. A unit of measurement, often for temperature or angles
- 19. A particular part or feature of something
Down
- 1. A feeling of amazement and curiosity
- 2. The layer of gases surrounding a planet
- 4. To provide with necessary tools or equipment
- 5. Evidence that something is true
- 6. To move forward or make progress
- 7. Something that is necessary or compulsory
- 8. To discover or notice something, often something hidden
- 9. Very large or extensive
- 10. A large, flat area of land with few trees
- 11. The visible features of an area of land
- 12. A low area of land between hills or mountains
- 13. Tiny particles of dirt or debris