Jupiter's Juno mission, the magical world of Pluto and spacewalking feature in this special fifth anniversary edition of the podcast. ESA's head of the neutral buoyancy facility, Herve Stevenin, explains how a giant pool helped astronaut Tim Peake obtain his space station spacewalk, and New Horizons scientists Lesley Young and Joel Parker from America's Southwest Research Institute share their extraordinary findings from Pluto. Space Boffins Sue Nelson and Richard Hollingham are joined in the studio by Robert Massey, from the Royal Astronomical Society, and space journalist Sarah Cruddas. Like this podcast? Please help us by supporting the Naked Scientists