Physics

Roots of Astronomy

Main objective of this lecture is to present on Roots of Astronomy. Already in the stone and bronze ages, human cultures realized the cyclic nature of motions in the sky. Monuments dating back to ~ 3000 B.C. show alignments with astronomical significance. Those monuments were probably used as c.....

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Lecture on Space Shuttle

A space shuttle is a reusable space craft. First used in 1981. They are able to land on an ordinary airfield. The space shuttle did many things. It could carry up to seven astronauts at a time. The space shuttle was like a moving van. Two shuttle tragedies in 1987 and 2003. Shuttles replaced the.....

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Space Exploration: Past, Present and Future

Space exploration is still in infancy. Although we have learned a lot, we still have a lot of questions. The cost of space exploration mandates that we work together with other countries. Example: International Space Station (ISS). Space Exploration history: The space age began on October 4, 1957.....

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How Newton derives Kepler’s Law of Areas?

Major objective of this lecture is to present on How Newton derives Kepler’s Law of Areas? Line from the sun to the planet sweeps out equal areas in equal times. Law of Areas derives in three ways. The Law of Orbits: All planets move in elliptical orbits, with the sun at one focus. The Law of.....

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Sir Isaac Newton’s Discovery

Prime objective of this lecture is to present on Sir Isaac Newton’s Discovery. Sir Isaac Newton was an English physicist, mathematician, astronomer, natural philosopher, alchemist and theologian and one of the most influential men in human history. As a result of his extensive contribu.....

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Hipparchus of Rhodes

Hipparchus of Rhodes became a famous astronomer in Alexandria. Around 150 BCE developed a new tool for measuring relative distances of the stars from each other by the visual angle between them. Hipparchus invented the table of chords, a list of the ratio of the size of the chord of a circle to .....

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Presentation on Ptolemaic System

Ptolemy’s system was purely geometric, like Eudoxus, with combinations of circular motions. The Ptolemaic system is a geocentric cosmology; that is, it starts by assuming that the Earth is stationary and at the centre of the universe. Ptolemy’s system for each planet involves a large (imagina.....

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Lecture on Claudius Ptolemy

Claudius Ptolemy lived about 150 CE, and worked in Alexandria at the Museum. Like Eratosthenes, Ptolemy studied the Earth as well as the heavens. One of his major works was his Geography, one of the first realistic atlases of the known world. Ptolemy’s major work was his Mathematical Composit.....

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Kepler’s Laws of Planetary Motion

Kepler’s Laws of Planetary Motion says: The orbits of the planets are ellipses with the sun at one focus. And second,  A line from a planet to the sun sweeps over equal areas in equal intervals of time. Kepler used the precise observational tables of Tycho Brahe (1546 – 1601) to study planet.....

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Geocentric vs. Heliocentric System

Basic objective of this lecture is to present on Geocentric vs. Heliocentric System. Geocentric System narrate: the Sun, stars, and planets on their spheres revolve around the earth: explains daily movement; to account for unusual planetary motion epicycles were introduced. Heliocentric System d.....

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Presentation on the Copernican Revolution

General objective of this lecture is to present on the Copernican Revolution. In the heliocentric or copernican model, apparent retrograde motion of the planets is a direct consequence of the Earth’s motion. The story of Copernican Revolution is the classic example of a major shift in worldv.....

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Presentation on Neutrinos

The Sun produces a lot of neutrinos. It travel extremely fast. Almost at the speed of light if small mass. Neutrinos pass from the core of the Sun to the surface in only two seconds. They take less than 8.5 minutes to travel the distance from the Sun to the Earth. Neutrino detectors use hundreds.....

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