THIS WEEK, AS part of the process to develop a budget for fiscal-year 2026, the Trump White House shared the draft version of its budget request for NASA with the space agency.
This initial version of the administration’s budget request calls for an approximately 20 percent overall cut to the agency’s budget across the board, effectively $5 billion from an overall top line of about $25 billion. However, the majority of the cuts are concentrated within the agency’s Science Mission Directorate, which oversees all planetary science, Earth science, astrophysics research, and more.
According to the “passback” documents given to NASA officials on Thursday, the space agency’s science programs would receive nearly a 50 percent cut in funding. After the agency received $7.5 billion for science in fiscal-year 2025, the Trump administration has proposed a science top-line budget of just $3.9 billion for the coming fiscal year.
Detailing the Cuts
Among the proposals were a two-thirds cut to astrophysics, (down to $487 million), a greater than two-thirds cut to heliophysics (down to $455 million), a greater than 50 percent cut to Earth science (down to $1.033 billion), and a 30 percent cut to Planetary science (down to $1.929 billion).
Although the budget would continue support for ongoing missions such as the Hubble Space Telescope and the James Webb Space Telescope, it would kill the much-anticipated Nancy Grace Roman Space Telescope, an observatory seen as on par with those two world-class instruments that is already fully assembled and on budget for a launch in two years.
“Passback supports continued operation of the Hubble and James Webb Space Telescopes and assumes no funding is provided for other telescopes,” the document states.
Other significant cuts include ending funding for Mars Sample Return as well as the DAVINCI mission to Venus. The budget cuts also appear intended to force the closure of Goddard Space Flight Center in Maryland where the agency has 10,000 civil servants and contractors.
The Passback Process
The cuts are in line with what Ars Technica exclusively reported last month, that the Trump administration was considering a massive 50-percent cut to NASA’s science programs. Publicly, some officials downplayed these concerns. As recently as this week, NASA’s acting administrator, Janet Petro, characterized this reporting as “rumors from really not credible sources.”
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