NASA is leading the next steps into deep space near the moon, where astronauts will build and begin testing the systems needed for challenging missions to deep space destinations including Mars. The area of space near the moon offers a true deep space environment to gain experience for human missions that push farther into the solar system, access the lunar surface for robotic missions but with the ability to return to Earth if needed in days rather than weeks or months.

The period of exploration in the vicinity of the moon will begin with the first integrated mission of the Space Launch System (SLS) rocket and the Orion spacecraft, and will continue as we explore further. NASA aims to begin a cadence of one flight per year after the second mission, and the agency has established an initial set of integrated human exploration objectives combining the efforts aboard the International Space Station, SLS and Orion, and other capabilities needed to support human missions to explore deep space.

Nextbigfuture thinks NASA needs to ditch the Space Launch System and work with Spacex and Blue Origin.

Deep Space Gateway

This first phase of exploration near the moon will use current technologies and allow us to gain experience with extended operations farther from Earth than previously completed. These missions enable NASA to develop new techniques and apply innovative approaches to solving problems in preparation for longer-duration missions far from Earth.