An astronomical system positing that the Earth, Moon, Sun, and planets revolve around an unseen "Central Fire" was developed in the fifth century BC and has been attributed to the Pythagorean philosopher Philolaus. The system has been called "the first coherent system in which celestial bodies move in circles", anticipating Copernicus in moving "the earth from the center of the cosmos [and] making it a planet". Although its concepts of a Central Fire distinct from the Sun, and a nonexistent "Counter-Earth" were erroneous, the system contained the insight that "the apparent motion of the heavenly bodies" was (in large part) due to "the real motion of the observer". How much of the system was intended to explain observed phenomena and how much was based on myth, mysticism, and religion is disputed. While the departure from traditional reasoning is impressive, other than the inclusion of the five visible planets, very little of the Pythagorean system is based on genuine observation. In retrospect, Philolaus's views are "less like scientific astronomy than like symbolical speculation." (Wikipedia).

From playlist Miscellaneous

http://www.teachastronomy.com/ Pythagoras was one of the most influential thinkers in history. This Greek philosopher and mathematician came up with the idea that numbers were the basis of everything. There is no written record, and nothing about Pythagoras survives in writing. He essen

From playlist 02. Ancient Astronomy and Celestial Phenomena

Converse Pythagorean Theorem & Pythagorean Triples

I explain the Converse Pythagorean Theorem and what Pythagorean Triples are. Find free review test, useful notes and more at http://www.mathplane.com If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage www.YouTube.com/Profro

From playlist Geometry

This geometry video tutorial provides a basic introduction into the pythagorean theorem. It explains how to use it to find missing sides and solve for x. In addition, it provides examples of solving word problems using pythagorean theorem for shapes such as right triangles, squares, rhom

From playlist Geometry Video Playlist

Greek Mathematics: Pythagoras and His Followers

Welcome to the History of Greek Mathematics mini-series! This series is a short introduction to Math History as a subject and the some of the important theorems created in ancient Greece. You are watching the second video in the series. If this series interested you check out our blog for

From playlist The History of Greek Mathematics: Math History

A Beautiful Proof of Ptolemy's Theorem.

Ptolemy's Theorem seems more esoteric than the Pythagorean Theorem, but it's just as cool. In fact, the Pythagorean Theorem follows directly from it. Ptolemy used this theorem in his astronomical work. Google for the historical details. Thanks to this video for the idea of this visual

From playlist Mathy Videos

Pythagorean theorem - What is it?

► My Geometry course: https://www.kristakingmath.com/geometry-course Pythagorean theorem is super important in math. You will probably learn about it for the first time in Algebra, but you will literally use it in Algebra, Geometry, Trigonometry, Precalculus, Calculus, and beyond! That’s

From playlist Geometry

Pythagorean Identity (Proof) - Algebra 2/Trigonometry

http://www.youtube.com/vinteachesmath This video will show students how to derive the Pythagorean Identity. In particular, the concepts of polar coordinates, the Pythagorean Theorem, and trigonometric functions will be used to derive the Pythagorean Identity. This video is appropriate f

From playlist Trigonometry (old videos)

The History of Mathematics in 300 Stamps

Oxford Mathematics Public Lectures: Robin Wilson - The History of Mathematics in 300 Stamps The entire history of mathematics in one hour, as illustrated by around 300 postage stamps featuring mathematics and mathematicians from across the world. From Euclid to Euler, from Pythagoras to

From playlist Oxford Mathematics Public Lectures

"Deciphering ancient texts in a lab: Glass coloring from cuneiform tablets to the Jabirian Corpus"

By George Saliba and Ahmad El Hellani In this presentation, Dr. George Saliba, the director of Farouk Jabre Center for Arabic and Islamic Science and Philosophy at the American University of Beirut, will give us an overview of the work of A. Leo Oppenheim on glass and glassmaking in ancie

From playlist On Broken Glass (Spring 2021)

8ECM Public Lecture: Robin Wilson

From playlist 8ECM Public Lectures

Episode 9: Early History - Project MATHEMATICS!

Episode 9. Early History of Mathematics: This video traces some of the landmark developments in the early history of mathematics, from Babylonian calendars on clay tablets produced 5000 years ago, to the introduction of calculus in the seventeenth century. A Program Guide and Workbook is

From playlist Courses and Series

Kepler's First Law of Planetary Motion

A brief history of geocentric and heliocentric solar system models are discussed. Kepler's first law is defined. How to draw an ellipse is demonstrated. Planet eccentricities are discussed. Want Lecture Notes? http://www.flippingphysics.com/kepler-first.html This is an AP Physics C: Mechan

From playlist JEE Physics Unit 6 - Gravitation and NEET Unit VI - Gravitation

Greek Science | Introductory Astronomy Course 1.13

Welcome to Astronomy: Exploring Time and Space, a course from Professor Impey, a University Distinguished Professor of Astronomy at the University of Arizona. Learn about the foundations of astronomy in this free online course here on YouTube. This video is part of module 1, Science and Hi

From playlist Introductory Astronomy Module 1: Science and History

The Man Who Loved Circles - Objectivity 142

At the Royal Astronomical Society discussing the much-loved but sometimes misguided Henry Perigal. More links below ↓↓↓ Featuring Sian Prosser from the Royal Astronomical Society speaking with Brady. Royal Astronomical Society website: https://www.ras.org.uk Objectivity on Patreon: http

From playlist Matt Parker (standupmaths) on Numberphile

Compare news coverage. Spot media bias. Avoid algorithms. Be well informed. Download the free Ground News app at https://ground.news/HOTU -------------------------------- Researched and Written by Leila Battison Narrated and Edited by David Kelly Animations by Jero Squartini https://www.fi

From playlist The Entire History of the Universe

"Dreams of Other Worlds" Chapter 11

We're reading "Dreams of Other Worlds," a book about the history of unmanned space travel by Chris Impey and Holly Henry on our Twitch channel! Every week on Monday at 9am PST we read another chapter on our TeachAstronomy Twitch channel and archive them here for anyone who misses it. Enjoy

From playlist Dreams of Other Worlds Book Read

Search for the Edge of Space - 4k

The universe has long captivated us with its immense scales of distance and time. Many astronomers today have come to believe that what we can see represents only a small fraction of all there is. They are pioneering bold new theories that describe a cosmic landscape that extends far beyon

From playlist SpaceRip 4K

The Pythagorean theorem is an easy to use relation in geometry among the three sides of a right triangle. It states that the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other two sides. To sup

From playlist Trigonometry and Pythagoras