SkyFall Mars – NASA’s March unveiling of SkyFall—a fleet of three identical helicopters to be launched to Mars in late 2028 aboard a nuclear-propelled spacecraft—has unsettled planetary scientists. They say the unclear cost, timing, and budget path could distract from Mars S
For more than a decade. Mars scientists have been building toward a single. stubborn goal: get samples from the Red Planet back to Earth so laboratories can interrogate their history and search for signs of ancient habitability and life. Then. in March. NASA unveiled SkyFall—an eye-catching plan to pack three identical helicopters into a first-of-its-kind nuclear-propelled spacecraft. launching to Mars in late 2028.
The pitch sounded bold. But the timing landed like a bruise in a program already bruised. Many planetary scientists say they were caught off guard and worry SkyFall’s arrival could crater existing Mars research efforts—both by pulling attention away from Mars Sample Return and by diverting funds from ongoing missions inside NASA’s cash-strapped science division.
“We’re in this tough spot of, when someone offers you something, it’s hard to say, ‘No thank you, I don’t want it,’” says Phil Christensen, a planetary scientist at Arizona State University. “You say, ‘Sure, we can do great science with that.’”
SkyFall is designed to fly on the first-ever spacecraft powered by nuclear fission. a vehicle called Space Reactor-1 Freedom that would be a pathfinder for larger. more capable nuclear propulsion projects. Under the concept, the spacecraft would release SkyFall near Mars. The fleet would be contained within a capsule that would descend through the atmosphere on parachutes. Then the capsule would deploy three helicopters in midair—another new feat for the agency.
NASA is still working to select a landing site that strikes a balance between low risks and high scientific rewards. according to details the space agency shared with Scientific American. The helicopters would be larger than NASA’s previous Mars helicopter, Ingenuity. Ingenuity launched in the belly of the Perseverance rover. reached Mars in 2021. flew more than 10 miles during more than 70 flights. and lasted nearly 1. 000 Martian days before it became too damaged to fly. Ingenuity carried only a basic camera, and its work was limited to reconnaissance for Perseverance.
SkyFall’s bigger helicopters are intended to carry not only a camera but also basic weather equipment and ground-penetrating radar. Those instruments would gather observations primarily during each vehicle’s short flights. NASA personnel are still determining how many flights each helicopter should make. per the space agency’s statement to Scientific American.
But even as the technology promises new discoveries—assuming NASA can execute the required advances—its mission goals are seen by critics as a mismatch for the work many scientists view as urgent. SkyFall’s stated objectives include scouting unexplored terrain, detecting stores of subsurface ice, and monitoring atmospheric dust. Those tasks are useful. Still. they fall far from Mars Sample Return. the decades-long effort aimed at bringing samples from Mars to Earth for intensive study.
Mars Sample Return was well underway. with specimens cached on Mars ready for retrieval. but it is now in limbo because of budget cuts. Some scientists argue SkyFall won’t meaningfully change other big-picture questions either. including digging into the planet’s history or understanding how Mars’s surface and atmosphere interact.
Vicky Hamilton. a planetary scientist at the Southwest Research Institute. describes SkyFall as insufficiently aligned with the program she says researchers had been building toward. “It’s a demonstration mission; it’s not really a science mission,” she says. “It’ll do some science,” she adds, but “it’s not what we’d intended.”.
Hamilton also argues SkyFall could actively harm Mars science. “The chances are quite high that more than one currently operating mission at Mars will be terminated and their funds redirected to supporting SkyFall. ” she wrote in a co-authored memo from the NASA-advising Mars Exploration Program Analysis Group. of which she is the most recent past president.
Any disruption would come as NASA’s Mars lineup is already strained. Besides Mars Sample Return being in limbo. NASA is also down a Mars orbiter: the Mars Atmosphere and Volatile Evolution (MAVEN) mission ended after it lost contact with Earth last December. That leaves NASA’s Mars fleet with two aging orbiters—Mars Odyssey. which arrived in 2001. and the Mars Reconnaissance Orbiter. which arrived in 2006—along with the Curiosity and Perseverance rovers. which landed in 2012 and 2021. respectively.
Hamilton’s concern lands on a deeper issue: the future isn’t set to replace what could be lost. NASA has an instrument on the European Space Agency’s Rosalind Franklin rover. And there is SkyFall itself—along with a proposed “Mars Telecommunications Network” and a newly announced weather payload. both targeting launch in 2028 via a public-private partnership. None. critics argue. are the kind of mission Mars researchers have come to rely on for major advances in understanding the planet.
Christensen hopes the program won’t squeeze everything else out. “I hope SkyFall doesn’t become ‘Well, okay, that’s your Mars mission for the decade’—that would be too bad,” he says.
Behind the scientific debate sits a more immediate problem: money, and the lack of clarity around it. Three months after SkyFall’s announcement. NASA still has not explained where the money for the project would come from or how much it might cost. “SkyFall is a new effort, and cost estimates are currently in development,” a NASA spokesperson told Scientific American. As of the time of publication, NASA’s budget information hub did not include any documents referencing the SkyFall project.
“This has been a very opaque process. ” says Jack Kiraly. director of government relations at the Planetary Society. a nonprofit organization that advocates for space exploration. Kiraly says that although he’s personally excited about SkyFall, the agency owes the public more transparency about its plans.
NASA, as a federal agency, receives an annual budget from Congress each year. Legislators are currently hashing out appropriations for the next fiscal year, beginning on October 1. Kiraly notes that while draft legislation under consideration in the House of Representatives explicitly notes support for SkyFall. Congress typically trusts agencies to decide how to distribute allocated funds among programs.
That’s where Kiraly believes SkyFall is most likely to draw from the wrong pot. Rather than relying on funds for advancing technology or human exploration. he says SkyFall will probably draw funds from NASA’s science division’s Mars Exploration Program—specifically its budget line for future missions. The White House has requested $110 million for that budget line for the coming fiscal year. out of $248 million overall for NASA’s Mars research efforts.
A fast build and launch timetable by 2028, Kiraly argues, doesn’t match those numbers. “It’s going to need a lot of money up front,” he says. “That puts a lot of pressure on the rest of the portfolio.”
Hamilton puts the fear into a single, stark image: SkyFall “is basically going to eat the entire Mars Exploration Program budget for the foreseeable future.”
NASA SkyFall Mars helicopters Space Reactor-1 Freedom Mars Sample Return MAVEN Mars Odyssey Mars Reconnaissance Orbiter Curiosity Perseverance Rosalind Franklin rover Mars telecommunications network ground-penetrating radar subsurface ice atmospheric dust nuclear propulsion