
FY20 Budget Request: NASA
In its fiscal year 2020 budget request for NASA, the Trump administration proposes a 9 percent, $602 million cut to the Science Mission Directorate, which would leave its budget somewhat higher than where it stood in fiscal year 2018. The administration proposes a 2 percent cut for the agency as a whole.
There is considerable divergence in how each of the agency’s four science divisions would fare. The record-shattering $2.76 billion budget that Congress just provided
NASA’s budget request documents are available here

Several factors will shape Congress’ response to the administration’s request. The result of negotiations to raise the statutory cap on overall nondefense discretionary spending will strongly influence NASA’s final outcomes. In addition, this will be the first appropriations cycle since fiscal year 2015 that former Rep. John Culberson (R-TX), who took an intense interest in NASA, will not play a central role in crafting its budget. There are also a number of mission-level decisions that Congress must make that will bear on how much funding each division receives.
Astrophysics
James Webb Space Telescope. The administration requests $353 million for JWST, $156 million more than NASA anticipated requesting prior to the cost overrun
Wide Field Infrared Survey Telescope. The administration is repeating its proposal

An illustration of WFIRST, a flagship mission targeted for launch in the mid-2020s. For the second time, the Trump administration is proposing to cancel the mission. To keep it on track, Congress will have to provide it with $542 million.
(Image credit – NASA Goddard Space Flight Center)
Planetary Science
Europa Clipper. The administration requests that funding for the flagship Europa Clipper mission increase 9 percent to $593 million. The mission is expected to move into its final design and fabrication phase this year, at which time NASA will commit to its launch and assign an official estimate to its total budget. The current estimated life cycle cost range for the mission is between $3.1 billion and $4 billion. The administration assents to the provision in this year’s appropriations law directing it to launch in 2023 but proposes to use a commercial launch vehicle rather than the Space Launch System as currently required, stating it will save an anticipated $700 million. NASA plans for the Clipper to make more than 40 flybys of Jupiter’s moon Europa to gather data on the liquid water ocean believed to exist beneath its icy crust.
Europa Lander. The administration proposes to terminate preparations for a follow-on lander mission to Europa, citing “notional” estimates that it would cost between $3.5 billion and $5 billion in total. The budget document further explains the administration has “higher priorities” and that the recent midterm review
Mars 2020. NASA notes its next rover mission to Mars experienced cost growth in fiscal year 2019 owing to “technical issues” with three of its components, but offers no further details. Speaking at the recent annual Lunar and Planetary Science Conference, Planetary Science Division Acting Director Lori Glaze said
Lunar science. The administration proposes $210 million for its newly invigorated
Planetary defense. The administration requests $150 million for planetary defense, $10 million less than the current appropriation. Funding for the Double Asteroid Redirect Mission is scheduled to ramp down from $98 million to $72 million. The mission, which will test the effects of a direct impact on a double asteroid system, is targeted to cost $314 million in total and to launch in early 2022.
Lucy and Psyche. Funding for the smaller-scale Discovery-class Lucy and Psyche missions is set to crest at $219 million and $213 million, respectively. Lucy, targeted for launch in late 2021, will visit six asteroids with orbits tied to Jupiter’s. Psyche, targeted for launch in mid-2022, will visit a metallic asteroid.
New Frontiers missions. Three missions in NASA’s mid-scale New Frontiers program — New Horizons, Juno, and OSIRIS-Rex — are currently operating, and NASA expects to select the program’s next mission this year from two finalists
Earth Science
Decadal survey implementation. The budget request indicates NASA has initiated studies stemming from the recommendation in last year’s Earth Science decadal survey
PACE and CLARREO Pathfinder. The administration again proposes cancelling the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) satellite and the Climate Absolute Radiance and Refractivity Observatory (CLARREO) Pathfinder instrument. PACE is expected to cost between $805 million and $850 million and is funded at $161 million this year. A decision to confirm the mission is expected this summer with launch targeted for 2022. CLARREO Pathfinder is scheduled for installation on the International Space Station in 2023 and is expected to have a lifecycle cost of about $100 million. It is funded at $18 million this year.
OCO-3 and DSCOVR. The administration requests $7.4 million for the Orbiting Carbon Observatory 3 (OCO-3), an instrument scheduled for installation on the International Space Station this spring. The administration proposed cancelling it in its last two budget requests. The administration has similarly dropped its proposal to turn off NASA’s Earth-observing instruments aboard the multiagency Deep Space Climate Observatory (DSCOVR) satellite. Already in the extended phase of its mission, the administration is requesting $1.7 million for continued DSCOVR operations.
Landsat 9. As the next Landsat satellite proceeds toward its anticipated launch in 2021, its budget is ramping down from $162 million to $109 million.
Heliophysics
Solar probes. The administration requests $108 million for the “Living with a Star” program, which was funded at $376 million as recently as fiscal year 2018. The ramp down reflects the launch of the Parker Solar Probe last year and the anticipated launch of the Solar Orbiter Collaboration in early 2020. The latter probe is a partnership between NASA and the European Space Agency.
Interstellar Mapping and Acceleration Probe. Funding for IMAP, a probe designed to study the interaction between solar winds and the interstellar medium, is set to ramp up to $125 million as it proceeds toward its launch, targeted for 2024.
Explorer program. The budget for the division’s explorer program is set to increase to $182 million in anticipation of upcoming mission selections.