![]() ![]() ![]() stargaze/Saristot.htm">Aristole wrote in " On the Heavens." "All of which goes to show not only that the Earth is circular in shape, but also that it is a sphere of no great size: for otherwise the effect of so slight a change of place would not be so quickly apparent,". The stars also change position at different latitudes, which also points to a spherical planet. He also observed that the Earth casts a round shadow on the moon during an eclipse. He noted that ships sailing over the horizon disappear hull first. The moon, he noted, was also a sphere, so it would follow that the Earth is round as well.Ī century and a half later, Aristotle put forward what was likely the physical evidence that the Earth is round, according to the American Physical Society. provides the earliest arguments for why the Earth is round. The ancient Greeks figured it out 2,500 years ago without having to fly into space and take a snapshot. If you don't know that the Earth is a sphere, wrongly believing our planet to be flat, don't tell everyone on your Twitter feed and definitely don't make a song about it, or Neil Degrasse Tyson might come after you and respond in kind.Įarlier this week, rapper B.o.B publicly questioned a spherical Earth, throwing his support behind flat Earth theory in a series of tweets and memes and suggesting a NASA cover-up.ĭiscounting any photo taken by a NASA spacecraft - an untrustworthy source, according to B.o.B - and setting aside any images captured by other space agencies around the world or photos taken by commercial satellites while we're at it, how do we know for fact that the Earth is spherical?ĭistant Earth: A History of 'Pale Blue Dots' ![]()
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