space

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Across
  1. 4. — an object that moves around a planet or another object in space.
  2. 5. — a tool used to see things that are very far away.
  3. 6. — a person who studies and learns about the world through science.
Down
  1. 1. — a large round object that moves around a star.
  2. 2. — a small rocky object that moves around the Sun.
  3. 3. — to watch something carefully to learn more about it.
  4. 7. — an object in space made of ice, dust and rock.