TrueSciPhi

Podcast Profile: Astronomy 161 - Introduction to Solar System Astronomy

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47 episodes
2006 to 2009

Collection: Physics, Math, and Astronomy

Description (podcaster-provided):

Themes and summary (AI-generated based on podcaster-provided show and episode descriptions):

This podcast is an audio archive of a university-level introductory course on solar system astronomy for non-science majors, recorded live in a classroom setting. Across the lectures, it builds the core tools needed to describe the sky and the solar system, starting with scientific notation, metric units, and astronomical distance scales such as the astronomical unit and the light-year. It then develops practical sky knowledge and celestial geometry through constellations, angular measurement, and coordinate systems on Earth and on the celestial sphere.

A major theme is explaining familiar phenomena with physical models: the daily and annual motions of the sky, the causes of the seasons, lunar phases, and solar and lunar eclipses. The course also connects astronomy to human conventions by tracing how observations of the Sun and Moon underpin timekeeping, time zones, and calendar systems, including historical reforms.

The podcast follows the historical progression of ideas about planetary motion—from Greek geocentric and early heliocentric concepts through Copernicus, Tycho, Kepler, Galileo, and Newton—then uses Newtonian mechanics and gravity to explain orbits, tides, and evidence for Earth’s rotation and revolution. It introduces light and spectroscopy, atomic structure, and observational tools such as telescopes as foundations for how astronomers measure and infer physical properties.

In the latter portion, the focus shifts to comparative planetology: Earth’s age, interior, and atmosphere; the Moon’s geology and origin; solar system formation via accretion and the frost line; and surveys of terrestrial planets, gas and ice giants, moons, rings, asteroids, meteoroids, comets, and trans-Neptunian objects. It also addresses classification debates (including Pluto) and concludes with methods for detecting planets around other stars and what early discoveries imply about planetary systems.