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  • “Exploration is in our nature.” - Carl Sagan

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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Neptune

Neptune Odyssey: why we need to visit an ice giant

Leaders of the Neptune Odyssey study for the next planetary science and astrobiology decadal survey share their team’s exciting approach for an ice giant-orbiting spacecraft.

Pluto in enhanced color

Hope for Pluto—Should We Re-Redefine Planets?

Planetary geologist Kirby Runyon is lead author of an abstract that proposes a new, geophysical definition of what a planet is.