The New Horizons spacecraft has reached to the dwarf planet, Pluto. Now 7,000 miles above the surface, New Horizons is the first-ever space mission to explore a world so far from Earth.
Scientists are now waiting for New Horizons to "phone home." Data from the spacecraft could rewrite what is currently known about Pluto.
For more on why this is such a technical achievement, Emily Lakdawalla, science and technology coordinator at The Planetary Society, joined the show.
Click on the blue audio player above to listen to the interview.