Irene Pellegrini & Beatrice De Luigi

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Across
  1. 6. the nearest star to the Earth
  2. 8. it is a rock that can arrive on the Earth's ground from the space
  3. 10. it is largest measurement that the instuments can take
  4. 11. it is the quantity of matter that an object has
  5. 12. it is the smallest measurement that the instruments can take
  6. 13. they are celestial objects that orbit around a star and they are 8 in our solar system
  7. 15. the curved path of a celestial object around a star, a planet or a moon
  8. 16. number it is the number of protons in an atom (5;6)
  9. 17. thanks to it you're not flying in the Earth's athmosphere
  10. 18. it's the name of one of the most famous telescope
Down
  1. 1. they were part of ancient planets that disintegrated. They're between Mars and Jupiter
  2. 2. table it is a very important tool where all the elements are arranged in periods and groups (8;5)
  3. 3. there is a team of superheroes that protects it. It's an enormous system of stars, stellar remnants, interstellar gas, dust and dark matter, everything bounded together by gravity
  4. 4. it is the ratio of mass to volume
  5. 5. an astronomical object that is made up of hydorgen and helium and that geners its own light and produces very big quantity of energy
  6. 6. rocky object that orbits around a planet
  7. 7. it's also called dirty snowball
  8. 9. it depends on the force of attraction (gravity)
  9. 14. it is the ability to do a work