Across
- 1. the force of attraction between any two objects
- 4. a huge ball of gas that gives out heat and light energy
- 6. he discovered that there were moons orbiting jupiter
- 8. the telescope that orbits Earth and take photos of the galaxy
- 13. a large object orbiting the sun
- 14. a man made satellite that orbits a planet and takes photo
- 16. the man who found about gravity after an apple fell on his head
- 18. suggested that the planet move in an elliptical orbit
- 19. the force of attraction between any two object
- 20. a large object orbiting the sun
Down
- 2. he suggested that the earth did not move, and the sun, moon and planets were fixed to solid transparent spheres that rotated around the Earth.
- 3. an orbit where the satellite stays at the same speed as the Earth and stays at the exact point on the earth.
- 5. the amount of matter something is made of
- 7. the unit of force
- 9. below 2000 km. We can get to space easily to perform space tasks and missions. the ISS is in a LEO orbit.
- 10. an orbit where the satellite passes over the north and south poles
- 11. made the theory that the Earth moved around the sun
- 12. a celestial body orbiting Earth or another planet.
- 15. a space probe that lands on a planet or moon
- 17. the oval shape that a planet's orbit around the sun