It’ll have the most powerful solar-electric propulsion system ever flown.

As the International Space Station nears its retirement in 2030, NASA and its contractors are working full tilt on a new lab that will be whizzing through space much farther from Earth.

Maintaining a space station around a planetary body other than Earth won’t be an easy feat. While the ISS orbits just 250 miles above Earth and is only a short spaceflight away in an emergency, the moon is over 230,000 miles in the distance, with the quickest journey back home taking two to four days.