Lecture

General purpose of this lecture is to present on Nicolaus Copernicus. He was first known modern person to propose the Earth circles the Sun. Astronomer Nicolaus Copernicus was…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…