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  1. Asteroid - Wikipedia

  2. What Is an Asteroid? | NASA Space Place – NASA Science for Kids

  3. Asteroid Definition & Meaning - Merriam-Webster

  4. Asteroid | Definition, Size, & Facts | Britannica

  5. Asteroid: Definition, Size, Difference, Visibility, Facts

  6. ASTEROID | English meaning - Cambridge Dictionary

  7. What are asteroids? | Space

  8. ASTEROID | definition in the Cambridge English Dictionary

  9. Asteroids - What are asteroids? And are they dangerous?

  10. How Asteroids Work - HowStuffWorks

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