• Not-so-starry nights
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  • Why do people and animals need the night sky?
    Because we need to study the sky to learn about our place in the universe. Meanwhile, animals need night sky to find their way and to feel safe.
  • When the astronomers looked at the sky in the 1970s, did they see the stars and planets that they had studied? Why?
    No, they didn't. Because the city lights made the stars and planets impossible to see.
  • Which paragraph has this main idea "The night sky is much brighter than it used to be."
    History of the Problem
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