Someone might argue that a flat disk can also produce a round shadow.
The only shape that makes a perfectly circular shadow every single time, no matter the object’s orientation, is a sphere. Moreover, the Earth’s shadow on the Moon is ALWAYS circular at every lunar eclipse and doesn’t change with the Earth’s rotation. If you look at the Earth’s shadow during a lunar eclipse, you’ll notice that it is curved – like a part of a circle. Can you tell for yourself that the Earth is not flat? Yes, you can, and we’ll tell you how! ContentsĪ lunar eclipse occurs when the Earth comes between the Sun and the Moon, casting a shadow over our natural satellite.
Although the very existence of the “flat-Earth theory” is quite discouraging, we’d like to use it in a positive way – as an exercise in critical thinking.
While some people are getting ready to send astronauts to Mars in just a few years, other people, apparently, still don’t believe the Earth is round.
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