sirius Earth galaxy neptune australia desert orbit mountain

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Across
  1. 3. The name of the farthest and coldest planet in the solar system.
  2. 4. Blue Planet in the solar system.
  3. 7. The planets move around the sun in their own paths.
  4. 8. Smallest continent.
Down
  1. 1. A high land with pointed peak.
  2. 2. A hot sandy dry land.
  3. 5. A large group of stars.
  4. 6. The star that shines most brightly in the night sky.