Photos: Delta 4-Heavy launch gallery

NASA Administrator Charlie Bolden speaks to Spaceflight Now’s Stephen Clark about the upcoming test flight of the Orion space capsule on the EFT-1 mission.

Scientists believe they can explain how an ocean of water is lurking beneath an ice sheet inside Pluto’s prominent heart-shaped region, an iconic frozen landscape discovered during the New Horizons spacecraft’s flyby last year.

In a triumph of deep space navigation and with Pluto shrinking in its wake, NASA’s New Horizons spacecraft has steered on a course to reach a tiny object named 2014 MU69 for a whirlwind visit on New Year’s Day 2019.