Tag Archives: Horizon

How Much of the Earth Can You See at Once?

VSauce does it again. Fascinating stuff.

TOP 10 REASONS Why We Know the Earth is Round

The Case of the Ancient Astronauts – Erich von Däniken

This Nova documentary The Case of the Ancient Astronauts destroys the claims made by Erich von Däniken and his looney ancient astronauts (alien) theory. Read more about von Däniken below the video.

Enjoy 🙂


From Wikipedia:

Erich Anton Paul von Däniken (/ˈɛrk fɒn ˈdɛnkn/; German: [ˈeːrɪç fɔn ˈdɛːnɪkən]; born 14 April 1935) is a Swiss author of several books which make claims about extraterrestrial influences on early human culture, including the best-selling Chariots of the Gods?, published in 1968. Däniken is one of the main figures responsible for popularizing the “paleo-contact” and ancient astronauts hypotheses. The ideas put forth in his books are rejected by a majority of scientists and academics, who categorize his work as pseudohistory, pseudoarchaeology and pseudoscience.[1][2][3]

The Nova documentary The Case of the Ancient Astronauts shows that all the claims made by von Däniken about the Pyramid of Cheops were wrong in all accounts. The technique of construction is well understood, scholars know perfectly what tools were used, the marks of those tools in the quarries are still visible, and there are many tools preserved in museums. Däniken claims that it would have taken them too long to cut all the blocks necessary and drag them to the construction site in time to build the Great Pyramid in only 20 years, but Nova shows how easy and fast it is to cut a block of stone, and shows the rollers used in transportation. He also claims that Egyptians suddenly started making pyramids out of nowhere, but there are several pyramids that show the progress made by Egyptian architects while they were perfecting the technique from simple mastabas to later pyramids. Däniken claims that the height of the pyramid multiplied by one million was the distance to the Sun, but the number falls too short. If it were true, it would make the pyramid 93 miles high… He also claims that Egyptians could not align the edges so perfectly to true North without advanced technology that only aliens could give them, but Egyptians knew of very simple methods to find North via star observation, and it is trivial to make straight edges.[36]

Continue reading @ Wikipedia  –  –  –


Ancient Astronauts – Erich Anton Paul von Däniken

From The Skeptic’s Dictionary

Chariots of the GodsThe term ‘ancient astronauts’ designates the speculative notion that aliens are responsible for the most ancient civilizations on earth. The most notorious proponent of this idea is Erich von Däniken, author of several popular books on the subject. His Chariots of the Gods? Unsolved Mysteries of the Past, for example, is a sweeping attack on the memories and abilities of ancient peoples. Von Däniken claims that the myths, arts, social organizations, etc., of ancient cultures were introduced by astronauts from another world. He questions not just the capacity for memory, but the capacity for culture and civilization itself, in ancient peoples. Prehistoric humans did not develop their own arts and technologies, but rather were taught art and science by visitors from outer space.

Where is the proof for von Däniken’s claims? Some of it was fraudulent. For example, he produced photographs of pottery that  he claimed had been found in an archaeological dig. The pottery depicts flying saucers and was said to have been dated from Biblical times. However, investigators from Nova (the fine public-television science program) found the potter who had made the allegedly ancient pots. They confronted von Däniken with evidence of his fraud. His reply was that his deception was justified because some people would only believe if they saw proof (“The Case of the Ancient Astronauts,” first aired 3/8/78, done in conjunction with BBC’s Horizon and Peter Spry-Leverton)!

Most of von Däniken’s evidence is in the form of specious and fallacious arguments . . .

Continue Reading @ The Skeptic’s Dictionary – – –

Why does the moon look bigger on the horizon?

via Relatively Interesting

wpid-Moon-Illusion-Photo-Elias-Chasiotis_300pxWhen you look up at the evening sky as the moon begins to rise above the horizon, it seems to swell and then retract as it goes higher in the sky. This effect, where the moon looks bigger along the horizon, is known as the “moon illusion”. It’s not only limited to the moon – it can also be seen as the sun rises as sets. You can dispel the illusion by covering one eye or using a telescope. Humans’ binocular vision is only part of the reason behind the disparity in size. Not convinced? You can also hold a coin or another object up to the moon as it travels through the sky to provide a point of reference to see that the moon remains the same size despite its appearance.

How does the moon illusion work?

The true cause of the moon illusion is a mystery to scientists, both ancient and modern. The strange thing? The moon is actually roughly 1.5% smaller when it is near the horizon than when it is high in the sky, because it is farther away by up to one Earth radius.

One theory hypothesizes that the illusion occurs because when the moon or sun are along the horizon, your brain has more objects to use as a reference, thus allowing it to compare against size and distance. When you have the skyline with trees, buildings, and other objects, your brain tends to interpret the moon as larger than those objects. However, when the moon is far above the horizon, your brain has fewer objects to use as a reference to compare to the size of the moon. Therefore, when the moon is in the empty sky, it appears smaller.


The Ponzo Illusion: how to trick your brain

Ponzo_illusionPart of the reason your brain has such a hard time interpreting the size of the moon in the sky is because the moon’s size does not change as it goes across the sky. Other objects in the world around you (that are not in the sky) appear to be smaller as they move closer to you and gain size as they move farther away. This expectation is physiologically imprinted in your brain. Optical illusions that you may have seen where you compare the size of two lines or circles, such as the Ponzo Illusion, illustrate your brain’s ability to trick itself based on the sizes of objects. Note that in the Ponzo illusion, due to the converging lines, the image that is “further” appears to be larger – even though it is the same size as its foreground version.

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