space

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Across
  1. 1. station a large structure in space where astronauts live and work while studying the universe.
  2. 4. the curved path an object takes as it moves around another object in space, like a moon around a planet.
  3. 5. a test done to learn more about something or to see if a theory is correct.
Down
  1. 2. a person trained to travel and work in space, often conducting research or operating spacecraft.
  2. 3. the force that pulls objects toward each other, keeping us grounded on the surface of our planet.
  3. 6. the planet we live on, which has land, water, and air that supports life.