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  1. nasa.gov
    https://starchild.gsfc.nasa.gov/docs/StarChild/questions/question35.html

    What is the shape of the universe? - NASA

  2. nasa.gov
    https://starchild.gsfc.nasa.gov/docs/StarChild/questions/question54.html

    Who figured out the Earth is round? - NASA

  3. nasa.gov
    https://starchild.gsfc.nasa.gov/docs/StarChild/questions/question39.html

    How do we measure the distances to things in space? - NASA

  4. nasa.gov
    https://starchild.gsfc.nasa.gov/docs/StarChild/questions/question59.html

    How do we know that dark matter exists? - NASA

  5. nasa.gov
    https://starchild.gsfc.nasa.gov/docs/StarChild/questions/88constellations…

    88 Officially Recognized Constellations - NASA

  6. nasa.gov
    https://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/einstein…

    Albert Einstein - NASA

  7. nasa.gov
    https://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level1/einstein…

    Albert Einstein - NASA

  8. nasa.gov
    https://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level1/newton.…

    Sir Isaac Newton - NASA

  9. nasa.gov
    https://starchild.gsfc.nasa.gov/docs/StarChild/questions/question28.html

    How old is the universe? - NASA

  10. nasa.gov
    https://starchild.gsfc.nasa.gov/docs/StarChild/questions/redshift.html

    Redshift and Hubble's Law - NASA