Returning to the Moon
NASA's current priority when it comes to space travel is to get people to Mars sooner rather than later. The organization has said in the past that it's unable to get people to the Red Planet, but projects from the likes of SpaceX have kept the dream alive. If, however, the current U.S. administration decides to shift focus to the Moon, NASA wouldn't be caught completely off-guard and unable to adjust.
Speaking at Rice University earlier this month, Ellen Ochoa, director of NASA's Johnson Space Center, spoke about NASA's ability to go to the Moon if told to do so. She told Rice Space Institute director David Alexander, "I think we're very well set up to do it. It's not at all incompatible with what we're doing."
NASA's Orion spacecraft is key to the organization's current plans for Mars, with it and the Space Launch System rocket scheduled for a pair of test flights between 2019 and 2023. Afterwards, construction would begin on a "Deep Space Gateway" near the Moon, which would be used as a staging area for future missions to Mars and activity on the Moon itself.
Prepared for Anything
According to Ars Technica, it's unclear which aspects of the plan would remain if focus shifted from Mars to the Moon. The Deep Space Gateway, for example, could be replaced with a plan to skip that construction and just go straight to landing crew members and necessary cargo.
"What we've really tried to do at NASA is leave a lot of options open, to develop the basic capabilities — the spacecraft Orion and the heavy lift launch vehicle — and then talk with other partners about what they are interested in doing," added Ochoa.
Going to the Moon again before Mars has been brought up by other parties. In July, Amazon CEO Jeff Bezos said a permanent settlement should be built on one of the Moon's poles. In August, retired astronaut Chris Hadfield also stated settling on the Moon would be a better first move, saying it should be done "not just to reaffirm that we can get there, but to show that we can also live there."
Regardless of which location is chosen, it's clear that humanity has plans to settle off world. It's only a matter of time at this point, though we'll have to see if it comes true within the next 20 years.