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SpaceX Won A Mars Mission That Might Get Cancelled

A SpaceX Falcon Heavy rocket carrying NOAA's GOES-U lifts off from NASA’s Kennedy Space Center. Image: NASA
A SpaceX Falcon Heavy rocket carrying NOAA’s GOES-U lifts off from NASA’s Kennedy Space Center. Image: NASA

NASA may have selected SpaceX Falcon Heavy on Thursday to launch a rover to Mars, but the launch is far from a sure thing.  

SpaceX is tasked to fly the ESA Rosalind Franklin rover as soon as late 2028, for a reported $175.7M. But the White House’s FY2027 budget request also suggests canceling NASA’s participation in the Mars mission. What comes next is anyone’s guess. 

Science vs. schedules: ExoMars Rosalind Franklin is one of ~50 NASA science missions on the chopping block, the Planetary Society says, after the administration proposed a ~23% budget cut to $18.8B. 

The Planetary Society and several members of Congress say they want the cuts reversed. Meanwhile, NASA—which always has a backup plan—likely went ahead with a launch reservation just in case the mission survives the next budget season.

This is actually NASA’s second attempt at an ExoMars ESA partnership. 

  • The US canceled previous ExoMars obligations during a tough budget year in 2012.
  • ESA next tried partnering with Russia, but that fell apart after the Ukraine war.
  • The newer NASA agreement from 2024 would see the US provide a launcher, an instrument, a descent braking engine, and components such as electronics.

SpaceX’s interplanetary era: Rosalind Franklin is a rare but notable deep-space mission for SpaceX’s Falcon Heavy. Some other examples include:

  • The rocket’s debut launch in 2018 propelled a Tesla Roadster and astronaut mannequin to a heliocentric orbit. (SpaceX CEO Elon Musk also leads Tesla.)
  • Europa Clipper, which made a 2024 launch to the Jupiter moon.
  • The Nancy Grace Roman Space Telescope, expected to launch in October.

Few missions aside from the military or deep-space destinations, however, need this much rocket juice. 

  • Falcon Heavy hasn’t launched since 2024.
  • SpaceX’s 165 launches in 2025 were all Falcon 9s, or test missions of Starship.
  • Falcon Heavy’s manifest this year includes ViaSat-3 to GEO, and Astrobotic Technologies’ Griffin-1 to the Moon.