Space

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Across
  1. 2. any of the nine large heavenly bodies revolving around the sun and shining by reflected light
  2. 5. the force of attraction by which objects tend to fall toward the center of a mass, as that of objects falling on earth.
  3. 6. a bag of strong, light material filled with a gas lighter than air so as to rise through the air.
  4. 7. the satellite of the Earth
  5. 8. a body in space made up of a bright, central solid mass and a tail of dust and gas and that orbits the sun
  6. 10. a person who travels in the space
Down
  1. 1. a machine for converting heat energy into mechanical energy or power in order to produce force and motion.
  2. 3. a person who studies the universe
  3. 4. a large system of stars
  4. 9. a colorless, odorless gas, an element that is about one-fifth of the volume of the atmosphere and is present in a combined state in nature.