Across
- 1. person who takes part in space flights.
- 4. broken up rocky material and dust that is layered on top of bedrock on a celestial body, such as Earth.
- 6. planet outside the solar system, orbiting a star other than the sun.
- 9. very tiny living thing.
- 10. to move in a circular pattern around a more massive object.
Down
- 2. object that orbits around something else. Can be natural, like moons, or artificial.
- 3. study and investigation of unknown places.
- 5. scientific instrument that uses mirrors to view distant objects.
- 7. Allen Belt are concentrations of charged particles from space that are trapped by Earth’s magnetic field.
- 8. spacecraft designed to study part of the solar system and send information back to Earth.