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Mysteries of Cosmic Expansion
Explore key concepts and phenomena related to the expanding universe, galaxies, and celestial mechanics.
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Across
  • 1. Explosive death of a star
  • 2. High-energy particles from space reaching Earth
  • 3. Massive system of stars, gas, and dark matter
  • 9. Force that attracts objects toward each other
Down
  • 4. Object orbiting a planet or star
  • 5. A cloud of gas and dust in space
  • 6. Extremely bright and distant active galactic nucleus
  • 7. Invisible substance making up most of the universe's mass
  • 8. The scientific study of the universe's origin and development

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