Tyson opens the 9-minute video on Youtube with the phrase "We have video from space of the rotating spherical Earth, The Earth is round" when co-host Chuck asks if the Earth is flat or round. A quick web search for images of Earth taken from space is proof enough to dismiss the flat Earth theory. I'm asking anyone out there with a friend or colleague who's a flat-earther - show this to them, flood their messengers, spam their email inboxes, reverberate the facts in a verbal fashion until they don't want to be friends with you any more. excessive? The host of "Cosmos" released a new YouTube video on his channel that gives a reality check to the growing popularity of a fringe belief that the Earth is in fact a flat disk, and not a sphere as all scientists believe. And, two, we live in a country with a failed educational system.
A lunar eclipse occurs when the earth is directly blocking the sunlight for the moon.
"Our system needs to train you in not only what to know, but how to think about information and knowledge and evidence", Tyson says.
"If you see the shape of Earth's shadow on the moon, it is always round". Without rational thinking, humans would run around believing anything thrown at them.
Is Earth a flat surface or a spherical surface?
The first test involves watching a lunar eclipse.
And then there's the much more straightforward argument that if you watch a ship sail off, you'll eventually see it disappear into the horizon, and it would only disappear from view if it's moving on a round surface.
The second test involves three wells. At noon, when the sun is directly over your head, try looking at the bottom of the well.
"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. He also pointed out an ancient experiment conducted in 250 B.C.by Eratosthenes were he talked about two wells in two different cities.
If three deep wells are dug at three different positions, and the sun is overhead the well in the middle, it would be visible to the bottom.
"Something doesn't square here", he said.