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Passing Pluto: What We Know About The 'Dwarf Planet'

Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
Artist's concept of the New Horizons spacecraft as it approaches Pluto and its largest moon, Charon.

This morning NASA's New Horizons space craft is expected to pass fewer than 7,800 miles above Pluto's surface and send back pictures. Images have already revealed plenty of surprises about the mysterious "dwarf planet." Charissa Sedor, assistant manager of the Buhl Planetarium at the Carnegie Science Center, tells us what these latest finds reveal. 

  More Essential Pittsburgh segments can be heard here.

Also in today's show, a discussion on the Macy's closure and the VFW national convention.