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Estimation question

How many stars in the whole sky are bright enough to see with the naked eye?

How close can you get? Make your own guess and earn points before you look at the answer.

Guess it yourself and earn points
Show the answer and the reasoning

The answer

9,000 stars

Only about 9,000. And only part of them are above you at any one time.

How to get there

  1. Hundreds of billions of stars in the Milky Way
  2. but only the very brightest reach the eye's threshold
  3. = about 9,000 across the whole sky

Source: US National Park Service, June 2022: about 9,000 stars visible to the naked eye

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