Stars and Signs

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Across
  1. 3. Dwarfs, Giants and Neutrons are all types of what
  2. 4. Video Killed the ..... Star
  3. 5. Road sign that is red and octagonal
  4. 6. Movie featuring the song "When you wish upon a star"
  5. 8. Pop singer who sang "Sign of the times"
Down
  1. 1. Type of sign foretelling danger
  2. 2. Most commonly called the red planet
  3. 3. Never Eat ....... Wheat
  4. 7. Fourth Zodiac Sign