Astronomy Crossword

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