Scientists helping NASA put a rover on the moon are scratching their heads about why the mission was canceled and why they were told to end their operations within the next month.
The mission would have involved sending a robot to the moon’s polar region in 2022 to probe for things like underground water and hydrogen.
But, according to the Lunar Exploration Analysis Group (LEAG), a group of scientists that perform analyses for NASA lunar expeditions, the mission had been halted on April 23, and told to wrap up by the end of May.
In a letter sent to NASA Administrator James Bridenstine on Thursday, LEAG asked NASA to re-instate the mission, known as Resource Prospector, or RP, which was still in its early stages of preparation. The mission’s end comes after President Donald Trump signed a directive in December that called on NASA, along with private companies, to work towards returning humans to the moon.
“This action is viewed with both incredulity and dismay by our community, especially as the President’s Space Policy Directive 1 directs NASA to go to the lunar surface,” the LEAG said in its letter (emphasis theirs). “RP was the only polar lander-rover mission under development by NASA (in fact, by any nation, as all of the international missions to the lunar poles are static landers) and would have been ready for preliminary design review at the beginning of 2019.”
Phil Metzger, a planetary physicist at University of Central Florida and a member of the Resource Prospector science team, told The Verge, which broke this story, “There are no other [NASA] missions being planned to go to the surface of the Moon.”
Budget problems may be at the heart of the issue. The letter from LEAG mentions that RP was initially funded through the Human Exploration and Operations Mission Directorate, but then transferred to the Science Mission Directorate (SMD) budget.
Metzger stressed to The Verge the importance of the mission, and stated that it dovetailed with the White House’s directive to work with private companies. It could help companies know what minerals are available to mine on the moon in addition the plan to use a private company’s lander to get to the moon’s surface.
This positive sentiment about the mission was echoed by Dana Hurley, a planetary scientist, who works at the Applied Physics Lab in Maryland and who is on the LEAG executive committee.
“If we want to go back to the moon and really work on the moon and make it a place that we can set up research stations and study processes that are occurring on the moon … all these things are really enabled by being able to use resources on the moon for making fuel, propellant, life support, that sort of thing,” Hurley told the Washington Post. “This mission is a first step in trying to understand how we’re going to exploit those resources.”
Fortune was unable to reach NASA because its press office had already closed for the day An update appeared on NASA’s RP website on Friday that indicated that NASA still plans to explore the moon.