An artist's depiction of the surface of the planet Proxima b as it orbits the red dwarf star Proxima Centauri, the closest star to our solar system. The planet is a bit more massive than Earth, scientists say, and circles its star once every 11 days.
After entering orbit around Jupiter on July 4, the spacecraft's camera, JunoCam, has begun to send images like the one above back to Earth. Pictured here are Jupiter and three of its moons.
Courtesy of NASA
Congress is requiring NASA to travel to Jupiter's moon Europa by 2022. Currently, it is the space agency's only new mission planned for the outer solar system.