In this lecture we discuss the geocentric model of Ptolemy, the heliocentric model of Aristarchus and how Hipparchus tested it using the concept of parallax.  We also saw how to use observations of parallax to measure the distance to celestial objects.

In this lecture we discuss the geocentric model of Ptolemy, the heliocentric model of Aristarchus and how Hipparchus tested it using the concept of parallax. We also saw how to use observations of parallax to measure the distance to celestial objects.

ASTR209 - Lecture 4

This page contains live, video podcasts of Astronomy 209 (Introduction to Astronomy II - The Cosmos) lectures taught at the University of Calgary.  AST209 is a comprehensive, descriptive overview of various aspects of the universe outside the solar system covering topics such as: the history of astronomy, interstellar space, stars, galaxies, black holes, supernovae, and the origins of life and the universe.   Course details can be found at the AST209 Course website.

Education

This page contains live, video podcasts of Astronomy 209 (Introduction to Astronomy II - The Cosmos) lectures taught at the University of Calgary. AST209 is a comprehensive, descriptive overview of various aspects of the universe outside the solar system covering topics such as: the history of astronomy, interstellar space, stars, galaxies, black holes, supernovae, and the origins of life and the universe. Course details can be found at the AST209 Course website.

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ASTR209 - Lecture 4

ASTR209 - Lecture 4