There are probably some frantic emails flying between NASA headquarters and the White House right now.

In a tweet today (June 7), President Donald Trump appeared to signal a lack of support for NASA’s current push to put people on the moon in the 2020s — a push that he officially kicked off in December 2017 with the signing of Space Policy Directive 1 (SPD-1) and backed with a proposed funding increase just last month.

“For all of the money we are spending, NASA should NOT be talking about going to the Moon — We did that 50 years ago. They should be focused on the much bigger things we are doing, including Mars (of which the Moon is a part), Defense and Science!” the president tweeted.

Related: In Photos: President Donald Trump and NASA

SPD-1 directs NASA to establish a long-term, sustainable presence on and around the moon, and to use the experience gained in this effort to reach the ultimate human-spaceflight destination: Mars. So, the somewhat confusing latter part of the president’s tweet — calling the moon a part of Mars — may be a reference to the horizon goal laid out in SPD-1.

NASA has organized its crewed lunar plans into a program called Artemis, which includes the construction of a small, moon-orbiting space station known as the Gateway. The space agency initially targeted the late 2020s for the first crewed lunar landing since the end of the Apollo era, but the timeline was recently moved up significantly: In March, Vice President Mike Pence instructed NASA to make it happen by 2024.

Last month, Trump proposed giving NASA an extra $1.6 billion in 2020 to help achieve this ambitious goal.

The 2024 landing will take place near the moon’s south pole, where water ice appears to be common on the floors of permanently shadowed craters, and will involve at least one woman, NASA officials have said.

To date, 12 people have walked on the moon, as part of NASA’s Apollo program. All of them were men.

We’ll let you know if Trump clarifies his thinking on Artemis with another tweet or statement of some sort.

Mike Wall’s book about the search for alien life, “Out There” (Grand Central Publishing, 2018; illustrated by Karl Tate), is out now. Follow him on Twitter @michaeldwall. Follow us on Twitter @Spacedotcom or Facebook

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