|| Back to Lectures || A. Introduction) || B. Measurements || C. Motion of sky || D. Motion of Sun || E. Moon || F.History || G. Motion || H. Newton's laws || I. Gravity || J. Work-Energy || K. Electricity-Waves || L. Gas laws || The End ||

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Astronomy References 1) Encyclopedia 2) Glossary 3) Glossary 4) Astronomy 5) Physical Science

Illustrations(1) Converts between different units. Unit conversions (2) Define astronomical distances in light years, astronomical unit and parsec, Astronomical Unit (3) Arc degree, arc minutes and arc second are explained Angular distances , Angular speed (4) Use your hand to measure the Angular size (5) The Big Dipper and Polaris North Circumpolar Stars (6) The relative motion of stars are explained Relative motion of stars (7) How do we find the distances to stars? Distance to stars (8) parallax are explained (a) Parallax (b) Parallax (c) Best. Parallax animation (d) Measure the parallaxes of a few stars (e) Parallax