Across
- 2. DEVELOPED THREE LAWS ABOUT PLANETARY MOTION
- 3. OBSCURRING OF LIGHT FROM A CELESTIAL BODY AND ITS SOURCE OF ILLUMINATION
- 7. THE FORCE THAT HOLDS ALL CELESTIAL OBJECTS IN THEIR ORBITS
- 9. PLANET WITH THE LONGEST ORBITAL PERIOD
- 11. CIRCULAR MOVEMENT ABOUT AN AXIS
- 14. EARTH'S ONLY NATURAL SATELLITE
- 16. GAS GIANTS DON'T HAVE THESE BECAUSE THEY LACK A SOLID SURFACE
- 18. NEAREST STAR TO EARTH
- 19. PLANETS THAT HAVE A SOLID SURFACE
- 20. CLOSEST PLANET TO THE SUN
- 21. THE PATH A PLANET FOLLOWS AS IT REVOLVES AROUND THE SUN
Down
- 1. SUN-CENTERED
- 4. DWARF PLANET IN OUR SOLAR SYSTEM
- 5. LARGEST PLANET IN OUR SOLAR SYSTEM
- 6. THE SPEED OF EARTH AS IT GETS CLOSER TO THE SUN IN ITS ORBIT
- 7. JUPITER SATURN URANUS NEPTUNE
- 8. SMALL OBJECT THAT ENTERS EARTH'S ATMOSPHERE FROM SPACE AND BURNS UP DUE TO FRICTION
- 10. ECLIPSE WHEN THE MOON IS ALIGNED DIRECTLY BETWEEN THE SUN AND EARTH BLOCKING ALL OR PART OF THE SUN
- 12. STUDY OF THE PHYSICAL UNIVERSE BEYOND EARTH'S ATMOSPHERE
- 13. A CELESTIAL BODY OF ICE, DUST AND ROCK WITH AN ELONGATED AND ELLIPTICAL ORBIT
- 15. METEOROID THAT PASSES THROUGH THE ATMOSPHERE AND HITS THE EARTH'S SURFACE
- 17. SMALL ROCKY BODY ORBITING THE SUN MANY FOUND IN A REGION OF SPACE BETWEEN MARS AND JUPITER