![]() "The only thing that makes a perfect circle shadow every time is a perfect sphere." If Earth were flat, sometimes you'd get a flat shadow. ![]() "If you see the shape of Earth's shadow on the moon, it is always round. "Almost everything in the universe is either spheres or slight distortions of a sphere."Īs evidence, he cited the lunar cycle which everyone can observe. "All the laws of physics and the accounting of energy as processes unfold in the universe…they conspire to make things round."īodies that have a flatter shape have been compressed because they rotate extremely fast, which the Earth does not. He explained the physics around why heavenly bodies tend to be spherical, which he wrote about at length in his book Astrophysics for People in a Hurry. "Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and the sun are all spheres. "What's odd is there are people who think that Earth is flat but recognize that the moon is round," Tyson says. 'Flat-Earthers' are a small group who have gained notoriety in recent years for their unsubstantiated claims that the Earth's roundness is a conspiracy, and that the truth of the planet's shape is being withheld from the public. "The Earth is round."Īfter pretending to end the conversation after that definitive statement, the co-hosts went on to discuss how some people had come to believe in a flat planet. "We have video from space of the rotating, spherical Earth," Tyson says.
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