However, among the pictures for half a century, only one is striking. Date December 24, 1968, the crew of Apollo 8 mission took a photo now known as Earthrise, the earth appeared.
There is a group of people who said the picture was a fake - part of a world conspiracy by space agencies, governments and scientists. Welcome to the world of flat-earther, those who believe the earth flat.
Wrong. Flat earth theory is still outstanding and trusted. On the internet and a small meeting place in the UK and the U.S., flat earth peyakin groups meet to challenge the "conspiracy" that the earth is round.
People are obviously prejudiced against the ugly flat-earther, "said John Davis, who believed in flat earth theory based in Tennessee, referring to Microsoft's new ad.
"Many people use the term 'flat-earther' to harass, and connected with the trust blindly, indifference and even anti-intellectualism."
John Davis is a computer expert from Canada, he was first attracted to the flat earth theory after "read some books from Flat Earth Society a few years ago."
"I then realize how easy we accept," he said. "We humans seem to be satisfied by accepting what is told, no matter whether the information was contrary to our feelings."
Davis now believes "the Earth flat and horizontal - horizontal earth will continue forever." "And with a depth of at least 9000 kilometers," he added.
James McIntyre, a moderator Flat Earth Society discussion website in the UK, has a slightly different view. "Earth a bit much like a plate," he said. "The earth is not exactly flat due to geological phenomena like hills and valley. approximately 24 900 miles in diameter. "
McIntyre, who claims "made into a follower of the world is round in the British public school education system" says the reaction of friends and family terahadap his new beliefs vary, ranging from the "sense of disbelief to believe it's just a joke".
So how many flat-earthers today? Both Davis maupuan McIntyre was not sure exactly. Davis said was made "online information repository" to help local communities become a Flat Earth "global community". "Forgive the use of the term" global "this", he said.
And for part-time observer, it is difficult to accept that all this is not rarity in the 21st century. Do not all schoolchildren know that ships can disappear in the horizon and that the satellites orbiting the earth.
What about the photos from space that showed, without doubt, that the Earth is round? "The space agency is internationally conspiring to deceive the public in order to get a big advantage," said McIntyre. John Davis also says "the pictures were fake."
And how about the fact that nobody ever falls in the world that otherwise this disc-shaped?
McIntyre laughs. "This is probably the most frequently asked questions," he said. "By looking at a flat earth map that question can be explained easily - in the middle of the north pole and Antarctica comprises the entire circumference of the Earth. Navigation is a long trip around the world play on the surface of the earth. "
"The core flat earth theory was actually a conspiracy theory," he said. "Naturally, flat earth group who believe the moon landing look fake, as well as photographs from space."
Perhaps one of the most shocking in the book he revealed that Garwood is the average earth theory is a relatively a modern phenomenon.
Garwoon said everyone believed the earth until the time of darkness is the average historic mistake, and then "crazy idea" was disappeared after Christopher Columbus successfully sailed to America without "falling at the end of the world."
Flat earth theory to be excellent in the 19th century in England, with the rise of scientific rationalism, which seemed to threaten the authority of the gospel, some Christian thinkers attack the scientific world.
Samuel Birley Rowbotham (1816-1884) using the alias "Parallax" and founded a new school "Zetetic astronomical", he's around the UK to spread the theory that the Earth is stationary and the sun disk is only 400 miles away.
In the 1870's, the Christian writer John Hampden published several works about the Earth is flat and Newon Isaac describes as "a drunk or crazy." And the spirit of this attack was kept alive until now.
"For the question" how do we know what we know "is good, but good if we have the ability to receive compelling evidence - including photos of the earth from space. & Background