Across
- 4. cosmic snowballs of frozen gasses, rock and dust that orbit the Sun
- 6. small objects made of rock or metal that orbits the Sun
- 8. Planets inside the asteroid belt (terrestrial)
- 12. Suitable or good enough to live in/on
- 13. translucent material for protection against infrared antennae used on heat-seeking missile trackers
- 17. allows us to see without interference of Earth's atmosphere
- 18. satellite where multiple countries collaborate to learn more about space
- 19. vehicle (manned or unmanned) that can travel with wheels and bring back samples
- 21. the purpose of these missions is to create a place where scientist can live for a long time and study on the moon
- 22. Planets outside the asteroid belt (gas)
Down
- 1. objects in space that have entered a planet’s atmosphere that burn due to traveling at high speeds.
- 2. now used in fireproof clothing
- 3. Planets made of land (inner planets) Mercury, Venus, Earth, Mars
- 5. protect people and spacecraft against radiation, now used in homes
- 6. is a unit of measurement for distance used to measure large distances in space. 1 AU is 150 million miles. Earth is 1 AU away from the Sun
- 7. Planets made of mostly ice (Uranus and Neptun is arfplanet a smaller spherical object in space, that resembles a small planet but lacks certain technical criteria required to be classified as such.
- 9. telescope with mirrors to help gather more light from distant objects
- 10. Planets made of gas (outer planets) Jupiter, Saturn,
- 11. the perfect distance from the sun so that it is not to hot and not to cold.
- 14. a NASA technology originally developed for space communications and to protect people and spacecraft against radiation
- 15. originally designed for cushioned pilot seats in spacecraft
- 16. satellites transmit signals and information to Earth now used for navigation and phones
- 20. Layer of gases surrounding a planet