د.مصطفى محمود |العلم والايمان | هندسة الكون

[Music] Peace be upon you and God's mercy. Welcome! Tonight's program is for adults only. No one under 16 is allowed, so kids should go to sleep. Our topic today is actually quite difficult. Our children, at most, know about triangles, squares, and rectangles, but our topic today is bigger than the basic geometry that

children learn in schools. Our topic is the geometry of the entire universe. It's a very, very big topic that requires focus and attention. Everyone, open your ears and pay close attention.

Many years ago—I'll say how many, 1000, 2000, 3000 years—we knew the Earth was round and we calculated its circumference without flying in space, without satellites, and without photographing the Earth from the moon. This was done by a man from Upper Egypt, whom we talked about once, named Ariston. He was from Upper Egypt, and his

method was very simple. He planted a stick in Upper Egypt and another stick in Aswan. He noticed that the sun, at the same time in Upper Egypt and Aswan, cast a shadow in each place, with a difference in length. The length of the shadow in each place was different. Its length in the sky, even though the time is the same, so

the clever man deduced that this means that the sky is not on the same plane as the sky, and there must be an arc between them. The distance between the sky and the sky is an arc, part of the circumference. He took out a pen and paper, calculated, added, and subtracted the angle of the shadow and its length, and was able to deduce and calculate the circumference of the

Earth. He concluded that the Earth is a sphere, even though its shape is simple and straightforward. He knew this through calculation. No one had yet flown in the air and learned anything. This calculation and geometry are very important things. Now we have many tools, and we have landed on the moon and sent artificial satellites and spaceships to