Join Blueshift for a unique tour of the solar system, as we walk the B and A Trail's Planet Walk in Maryland and talk to scientists along the way. Armed with hiking boots and a portable recorder, Francis Reddy brings you the sounds of the solar system and a factoid about each planet along the way. Also featuring the Sun and lonely former-planet Pluto! Recorded during the 100 Hours of Astronomy earlier this month, this episode gives you a taste of the activities organized by NASA Goddard Space Flight Center and its community partners.