Since 2002, Planetary Radio has visited with a scientist, engineer, project manager, advocate, or writer who provides a unique perspective on the quest for knowledge about our Solar System and beyond. The full show archive is available for free.

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Syzygy science: Discoveries made during total solar eclipses

Planetary Radio marks its last show before the Apr. 8 total solar eclipse with a look back at discoveries made during totality.

Exploring solar eclipses through time

Ed Krupp, the director of Griffith Observatory in Los Angeles, shares insights from the fascinating field of archaeoastronomy.