Welcome to Astronomy - Section 1

Subject Contents

Study stars, galaxies, supernova, epicycles, satellites, and astronomical objects outside Earth's atmosphere. Learn about celestial poles and constellations. Change of seasons, annual motions, and labeling time zones. The lunar and solar eclipse. Laws of gravity and motion. Orbital periods, and synodic periods. Contributions from Issac Newton, Aristotle, Eratosthenes, Exodus, Ptolemy, Copernicus, Tycho Brahe, Johannes Kepler, Galileo Galilei, William Hershel, and Robert Hooke. Birth of astrophysics and concepts of the development of the universe. The discovery of star parallax and retrograde. Naming planets and the influences behind their name. A variety of models of our Solar system. Drawing an ellipse, labeling major and minor axis, and establishing focus points. Kepler's laws. What is the Moon? Asterism, alitude, azimuth, right ascension, declination, conjunction, opposition and elongation. Dark adaption, averted vision, What is astrophotography? The use of telescopes, Issac Newton's law of motion. Defintion of force, mass, acceleration, and speed. Understanding AU and MKS.


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Astronomy A1

The study of vast spaces outside the earth's atmosphere. The study of stars, galaxies, and planets

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Astronomy A2

Coloration of stars differ. The hottest stars are blue-white.

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Astronomy A3

The study of vast spaces outside the earth's atmosphere. The study of stars, galaxies, and planets

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Astronomy A4

Stars set on the west horizon.

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Astronomy A5

The earth casts a shadow on the moon because the Earth is in between the Sun and the moon. This is a lunar eclipse.

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Astronomy A6

Aristarchus discovery lead to the idea that the Earth orbits the Sun. 

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Astronomy A7

Early Asia kepted records of eclipse, comets, and exploding stars but lacked geometric models.

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Astronomy A8

Kepler's second law states planets orbits faster when it's closest to the Sun.

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Astronomy A9

Dec stands for declination.

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Astronomy A10

Issac Newton invented the Newtonian reflector.