There are a multitude of methods in which any one can prove that the earth is a sphere. These are the most common.You can launch a rocket to a high altitude and take pictures of the earth (which various government agencies and private groups have already done thousands of times in the past), but that isn't the most practical way. Pictures and videos taken by orbiting satellites and space stations are certainly the most definitive proof that the earth is a sphere.But if you're not convinced, read on...You can also observe, with binoculars, ships slowly 'sinking' below the horizon as it sails farther and farther out to the ocean, then watch them come back. They certainly didn't fall off the edge of the earth! You can also sail or fly around the world.The Greeks discovered that the earth is round by observing lunar eclipses (i.e. when the earth blocks the sun from the moon, casting its round shadow on the moon's surface).Another method is simultaneously measuring the length of the shadows cast by identical poles perpendicular to a flat surface that is tangential to the earth's radius at various, distant locations. If indeed the earth is round, then the shadows should all vary in length from one distant location to another, which means that the angle at which the parallel rays of sunlight struck each pole varied from one location to another. (recall the alternate-angles theorem from Geometry class) If the earth is flat, then the lengths of all the shadows should be identical when measured simultaneously, since all rays of sunlight that strike the earth are parallel. However, they are not identical, but in fact, varies in such a way that the angles indicate a spherical surface. (This was one of the earliest methods to determine the radius of the earth)Also, keep in mind the 24 hour time zones. When it is noon in Hawaii, it is approximately midnight in the Middle East and vice versa. How can it be noon and midnight simultaneously? It is certainly impossible with a flat earth and a sun millions of times more massive.If I were a billionaire and physically fit, then proving to you the earth is round would be no problem. I can just take you with me on the space shuttle and we'll watch with our own eyes the earth from the orbiting International Space Station.I have heard from astronauts that there is no experience comparable as watching the earth from above.
The earth is round.
Which part do you disagree with?
That the earth is flat. You cannot prove it
Flat Earth Society is a cult. Fact.
Lady Bount[/url] was among the first to provided photographic evidence for a Flat Earth: [blah blah blah]
Dear Cecil:I have utter and absolute trust that the Earth is a sphere. And yet I have never had any personal experience that would convince me of this. I have accepted it as a matter of faith. As someone said, "Common sense is what tells us that the world is flat." For all I know from personal experience, the world might be shaped like a frisbee, which is round and has a curved surface, but is not a sphere. Perhaps Magellan, in circumnavigating the Earth, sailed in a circle around the North Pole in the middle of the frisbee to get back to his starting point. Taking the word of the astronauts is like taking the word of somebody about his religious experiences--interesting but not convincing.My unfounded albeit profound faith that the world is a sphere is matched only by my faith that you can come up with some proof I can personally experience to prove that our planet is indeed an orb. --Allan H., Topanga, California
Cecil replies:I know you mean this question to seem delightfully impertinent, Allan, but you're about 30 years too late. There are, after all, innumerable photographs of the earth taken from space which reveal it to be spherical. Assuming you are not about to join the Flat Earth Society in proclaiming these a fake, I gather your complaint is that looking at a photo doesn't qualify as "personal experience." Big deal. I've never personally experienced Disney World, either. Most of what we know about anything depends on taking somebody else's word for it.That said, there are a few home-demonstration-type indications--not proofs--that the earth is a ball. We'll start with ones you've already thought of:(1) Departing boats gradually sink below the horizon, as do buildings on the shore from the viewpoint of the sailors. Admittedly this only proves the earth is round right where you are--the frisbee hypothesis.(2) "The sphericity of the earth is proved by the evidence of ... lunar eclipses," Aristotle says. "For whereas in the monthly phases of the moon the segments are of all sorts--straight, gibbous [convex], crescent--in eclipses the dividing line is always rounded. Consequently, if the eclipse is due to the interposition of the earth, the rounded line results from its spherical shape" Of course a frisbee, properly angled, would make a round shadow too. But if the frisbee rotated while the eclipse was in progress, the curvature of its shadow would change. The earth's does not.(3) The constellations shift relative to the horizon as you move north and south around the globe, something that could only happen if you were standing on a sphere. (You may have to draw a few diagrams to convince yourself of this.) Given sufficient world travel combined with careful observation on your part, the frisbee hypothesis becomes well-nigh insupportable. I suppose this doesn't qualify as a home experiment, but I never said science would be easy.--CECIL ADAMS
But gravity as a force does not exist...
Q: "Why has no-one taken a photo of the Earth that proves it is flat?"A: The government prevents people from getting close enough to the Ice Wall to take a picture.Q: "How did NASA create these images with the computer technology available at the time?"A: Since NASA did not send rockets into space, they instead spent the money on developing advanced computers and imaging software instead
to blind side me with stupidity
Quote from: Moonlapse on May 16, 2008, 11:21:07 PM to blind side me with stupidity Irony...
Q: "What's underneath the Earth?" aka "What's on the bottom?" aka "What's on the other side?"A: This is unknown. Some believe it to be just rocks, others believe the Earth rests on the back of four elephants and a turtle.
We know it's there.
Quote from: Moonlapse on May 16, 2008, 11:11:48 PMWe know it's there. How do you 'know it is there"?
You're right, I have no idea. The government, THE WORLD'S GOVERNMENTS HAVE LIED TO US!
Quote from: Moonlapse on May 16, 2008, 11:31:19 PMYou're right, I have no idea. The government, THE WORLD'S GOVERNMENTS HAVE LIED TO US!You have been lied to. All this time you have been taught that gravity was a force. I was pretty pissed off too, when I found out the truth.
So now we're not accepting photographic evidence, but we're accepting written testimonials about photographic evidence. Haha.
Of course the water is level you idiots!Gravity pulls on everything with the same amount of force, so why the hell wouldn't it be level?!
How can water be level on a globe?
You are free to accept whichever evidence you'd like. However, which type of evidence a better proof for the subject matter; A repeatedly preformed experiment that anyone can easily reproduce and conduct over a long body of water, or an experiment impossible to preform unless you are a government agency with a multi-billion dollar budget?It boils down to a matter of first hand evidence which has been peer reviewed over and over again for the last 150 years versus third hand evidence which has undergone no peer review. No one has peer reviewed NASA's Apollo missions. So which type of evidence is more reliable?
A repeatedly preformed experiment that anyone can easily reproduce ...
No one has peer reviewed NASA's Apollo missions. So which type of evidence is more reliable?
Regarding the spherecity of the earth, the following papers that you have referenced seem a little shaky. If you would, please explain your reasons for their inclusion. Dr. Aprille Ericsson-Jackson, NCA&T 'Experiences & Opportunities for a Ph.D. Student' Greensboro, NC January 1,2000 Dr. Aprille Ericsson-Jackson, Texas Southern University 'How to Make an Outstanding Technical Presentation' Dallas, TX February 5, 2000 Dr. Aprille Ericsson-Jackson, Tarrant County College 'Obtaining One’s Goals in a Technical Environment' Ft. Worth, TX February 7, 2000
Jesus is officially made of fail. Eat that, Christianity!
The human race is a virus with shoes.