Curvature: computations with illustative formulas

Curvature, yes. Earth’s curvature is a topic about which a number of calculations are available: you just need surfing the net and search for everything you want. A great number of images, posts, and videos show full evidence there is no curvature. Notwithstanding, I want to discuss the topic all the same. In fact, it touches our senses in a very sensible way. I’m going to deal first with computations and then with some example.

In the following calculation, I would like to show what is the fall you can expect for a given distance on the surface of the earth. As a start, I have to say that I’m going to show the whole reckoning but, if you are not interested in it, you can simply check the final formula. In fact, it is very handy to prove the Earth is a plane surface. Read more

Eratosthenes’ experiment proves the earth is flat

Eratosthenes was a Greek mathematician born in Cyrene in 276 B.C. He was not the first one describing the Earth as a sphere. Plato and Aristotle had done before. Plato wrote that the Creator “made the world in the form of a globe, round as for a lathe, having its extremes in every direction equidistant from the centre, the most perfect and the most like itself of all figures,” “one of those balls which have leather coverings in twelve pieces…” (Plato. Phaedro. p. 110b; Timaeus. p.33). Read more

Isotropy and Einstein’s Special Relativity

Isotropy and the growth rings of a tree

Isotropy is uniformity in all orientations. So, in this lecture, the reader will find a brief inquiry into an old alchemic principle. Our universe shows everywhere uniformity and auto-similarity. So it appears the same from any position. In order to explain this reality, Einstein elaborated and achieved his special relativity theory. Read more

Latitude, Longitude, the UN flag

Above: The UN Flag

Below: A geographical Earth image viewed above the North Pole

Latitude and longitude are the geographic coordinates that specify the position of a point on the Earth’s surface. In this post, you will find the reasons why each degree in the latitude on the earth and each degree of longitude at the Capricorn Tropic are reckoned to measure 111 kilometers. Moreover, I will add a deeper explanation into the meaning of the United Nations flag. Read more