How did Pluto capture its largest moon, Charon?

Pluto pulled Adeene Denton into its orbit during her undergraduate internship at the Lunar and Planetary Institute in Houston. It was summer 2015, when the New Horizons spacecraft zoomed past the dwarf planet. 

“The Pluto flyby happened, and I was in the right place at the right time — perfectly positioned to fall in love with it,” says Denton, a planetary scientist at the Southwest Research Institute in Boulder, Colo.