Getty Images/Shutterstock/NASA; illustration by Dave Mosher/Business Insider

When Donald Trump is sworn in on January 20, there’s a good chance he could scrap one of President Obama’s boldest visions for NASA: the asteroid redirect mission, or ARM.

ARM would ostensibly launch a robotic probe to an asteroid in 2023, capture the space rock, and tow it near the moon. Next, astronauts would ride NASA’s shiny new Space Launch System and Orion space capsule (which aren’t finished yet) to visit and dig into the asteroid sometime in 2025.

But ARM’s slipping deadlines, ballooning costs, redundancy with the recently launched asteroid-sampling OSIRIS-REx probe, and seeming incongruence with the space agency’s larger ambitions to send people to Mars will almost certainly doom the mission, Eric Berger reported for Ars Technica in February. (The Trump-friendly House Committee on Science, Space and Technology also recently sent an unfriendly letter about ARM to NASA, and it appears to be yet another presumed nail in ARM’s coffin.)

So what could a Trump-controlled NASA replace it with?

Physicist and former astronaut John Grunsfeld, who recently retired as the leader of NASA’s science mission directorate, is pitching a popular idea involving a retrieving a sample of Martian soil, as Berger reported on Monday.