Across
- 1. How far could Galileo's telescope see?
- 3. What is the biggest planet in our solar system?
- 4. How many moons does the earth have?
- 8. An orbit around the earth with an orbital period of one sidereal day, matching the earth's sidereal rotation period.
- 12. In which orbit is the ISS(international space station) in?
- 13. An object which has been placed into orbit by a human endeavour
- 16. what is the name of the first artificial satellite placed into orbit.
- 17. what is the brightest planet in the solar system?
Down
- 2. the hypothetical process of modifying a planet's atmosphere, temperature... in order to make it habitable by humans.
- 5. How many planets are there in our solar system?
- 6. Which mission was the first to land on the moon?
- 7. when a space craft leaves earth and explores space
- 9. A group of stars forming a recognizable pattern.
- 10. eclipse What is it called when the moon completely covers the sun from our view from earth?
- 11. The angle between an objects rotational axis and its orbital axis
- 14. month the time between two identical phases
- 15. How many people have walked on the moon?