Astronomy and Space Exploration

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Across
  1. 3. A highly magnetized rotating neutron star that emits beams of electromagnetic radiation
  2. 6. Man-made object orbiting around Earth
  3. 8. The fourth planet from the Sun
  4. 9. A prominent constellation located on the celestial equator and visible throughout the world
  5. 10. The eighth planet from the Sun
  6. 11. Group of stars forming a recognizable pattern
  7. 13. The smallest planet in our solar system
  8. 15. A space telescope named after Edwin
Down
  1. 1. The explosion of a dying massive star
  2. 2. A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction
  3. 4. First man to walk on the moon's surface
  4. 5. The largest planet in our solar system
  5. 7. Galaxy nearest to the Milky Way
  6. 12. NASA's program that resulted in 12 astronauts walking on the moon
  7. 14. A celestial body with a glowing tail