The universe

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Across
  1. 3. Centauri Nearest star to Earth
  2. 4. What type of galaxy is the Milky Way galaxy?
  3. 5. On what planet is the Great Red Spot?
  4. 6. What is the most volcanically active body in our solar system?
  5. 7. What do scientists use to search for life in distant space?
Down
  1. 1. How many comets are there in the solar system?
  2. 2. How much of the universe is in a plasma state?
  3. 4. Brightest star