Planetary Radio: Space Exploration, Astronomy and Science

Happy Asteroid Day!

Planetary Radio: Space Exploration, Astronomy and Science

Asteroid Day, June 30th, marks the anniversary of the great Tunguska impact that leveled a Siberian forest. It reminds us that a Near Earth Object can destroy a city or even a civilization. Former Minor Planet Center Director Tim Spahr reviews our efforts to find and understand these bodies.

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