Physics

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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Theoretical Explanation: Solar System

Principle purpose of this lecture is to present on Theoretical Explanation: Solar System. Ptolemy explain the geocentric model, that the Earth is at   rest at the center of the Universe. Copernicus published the heliocentric model. Galileo explain his observations by telescope verified the he.....

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Presentation on Solar Flares

Solar flares are a violent explosion above the suns surface. A large amount of energy is released. Solar flares may last for 10 mins and will produce more energy than a million hydrogen bombs. There is a peak in this type of activity ever 10-11 yrs, during which large numbers of charged particle.....

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Exploration Goals of NASA

Exploration Goals of NASA is Earth Observing System. Understand Earth’s systems and its response to natural or human-induced change and Improve prediction of climate, weather, and natural hazards. More Exploration Goals are; Changes in solar activity influence Earth by disrupting telecommuni.....

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Space Infrared Telescope Facility: Herschel Experiment

Major purpose of this lecture is to present on Space Infrared Telescope Facility: Herschel Experiment. Space Infrared Telescope Facility exploring the universe in the infrared. Planned launch: December 2002 and expected lifetime: 5 years. Objective of Herschel Experiment: To perform a version o.....

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Lunatics: Sun, Earth, and Moon

The aim of this lecture is to present on Lunatics: Sun, Earth, and Moon. In a lunar eclipse, the Earth moves between the sun and the moon and casts a shadow on the moon. Lunar Libration: The spin of the Moon proceeds at a uniform rate while the orbit is at a slightly nonuniform rate. The spin .....

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Presentation on Sun Seasons

Prime purpose of this lecture is to present on Sun Seasons. Here briefly describe on Properties of the Sun; Influence on Earth: Gravity; Light and Solar wind and Life cycle of the Sun. Many people believe that Earth is closer to the sun in the summer and that is why it is hotter. And, likewise.....

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Cosmic Rays and Solar Flares

Cosmic rays are fast-moving ionizing particles from the Sun. The Earth’s magnetic field prevents them from reaching us because they would be very harmful. Solar flares (bursts of energy from the Sun) interfere with these satellite systems. Cosmic rays are not really rays at all, they are a stre.....

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