Astronomy Crossword

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Across
  1. 2. The second closest star to the Earth.
  2. 4. The second smallest type of exoplanet.
  3. 6. A large cloud of gas and dust.
  4. 8. The cloud of celestial bodies at the edges of the solar system.
  5. 9. The shape of the planets' orbits
  6. 10. The outer layer of a comet.
Down
  1. 1. The substance which accounts for 85% of the universe.
  2. 3. The largest star in the Milky Way galaxy.
  3. 5. The comet in our solar system which can be seen from Earth every 76 years.
  4. 7. Reddish loops on the sun's surface which link sunspots.