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By Space Force
In partnership with the Air Force Research Laboratory, the United States Space Force is currently accepting proposals for USSF University Consortium/Space Strategic Technology Institute 4, focused on Advanced Remote Sensing.
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By NASA
5 Min Read Making Mars’ Moons: Supercomputers Offer ‘Disruptive’ New Explanation
A NASA study using a series of supercomputer simulations reveals a potential new solution to a longstanding Martian mystery: How did Mars get its moons? The first step, the findings say, may have involved the destruction of an asteroid.
The research team, led by Jacob Kegerreis, a postdoctoral research scientist at NASA’s Ames Research Center in California’s Silicon Valley, found that an asteroid passing near Mars could have been disrupted – a nice way of saying “ripped apart” – by the Red Planet’s strong gravitational pull.
The team’s simulations show the resulting rocky fragments being strewn into a variety of orbits around Mars. More than half the fragments would have escaped the Mars system, but others would’ve stayed in orbit. Tugged by the gravity of both Mars and the Sun, in the simulations some of the remaining asteroid pieces are set on paths to collide with one another, every encounter further grinding them down and spreading more debris.
Many collisions later, smaller chunks and debris from the former asteroid could have settled into a disk encircling the planet. Over time, some of this material is likely to have clumped together, possibly forming Mars’ two small moons, Phobos and Deimos.
To assess whether this was a realistic chain of events, the research team explored hundreds of different close encounter simulations, varying the asteroid’s size, spin, speed, and distance at its closest approach to the planet. The team used their high-performance, open-source computing code, called SWIFT, and the advanced computing systems at Durham University in the United Kingdom to study in detail both the initial disruption and, using another code, the subsequent orbits of the debris.
In a paper published Nov. 20 in the journal Icarus, the researchers report that, in many of the scenarios, enough asteroid fragments survive and collide in orbit to serve as raw material to form the moons.
“It’s exciting to explore a new option for the making of Phobos and Deimos – the only moons in our solar system that orbit a rocky planet besides Earth’s,” said Kegerreis. “Furthermore, this new model makes different predictions about the moons’ properties that can be tested against the standard ideas for this key event in Mars’ history.”
Two hypotheses for the formation of the Martian moons have led the pack. One proposes that passing asteroids were captured whole by Mars’ gravity, which could explain the moons’ somewhat asteroid-like appearance. The other says that a giant impact on the planet blasted out enough material – a mix of Mars and impactor debris – to form a disk and, ultimately, the moons. Scientists believe a similar process formed Earth’s Moon.
The latter explanation better accounts for the paths the moons travel today – in near-circular orbits that closely align with Mars’ equator. However, a giant impact ejects material into a disk that, mostly, stays close to the planet. And Mars’ moons, especially Deimos, sit quite far away from the planet and probably formed out there, too.
“Our idea allows for a more efficient distribution of moon-making material to the outer regions of the disk,” said Jack Lissauer, a research scientist at Ames and co-author on the paper. “That means a much smaller ‘parent’ asteroid could still deliver enough material to send the moons’ building blocks to the right place.”
It’s exciting to explore a new option for the making of Phobos and Deimos – the only moons in our solar system that orbit a rocky planet besides Earth’s.
Jacob Kegerreis
Postdoctoral research scientist at NASA’s Ames Research Center
Testing different ideas for the formation of Mars’ moons is the primary goal of the upcoming Martian Moons eXploration (MMX) sample return mission led by JAXA (Japan Aerospace Exploration Agency). The spacecraft will survey both moons to determine their origin and collect samples of Phobos to bring to Earth for study. A NASA instrument on board, called MEGANE – short for Mars-moon Exploration with GAmma rays and Neutrons – will identify the chemical elements Phobos is made of and help select sites for the sample collection. Some of the samples will be collected by a pneumatic sampler also provided by NASA as a technology demonstration contribution to the mission. Understanding what the moons are made of is one clue that could help distinguish between the moons having an asteroid origin or a planet-plus-impactor source.
Before scientists can get their hands on a piece of Phobos to analyze, Kegerreis and his team will pick up where they left off demonstrating the formation of a disk that has enough material to make Phobos and Deimos.
“Next, we hope to build on this proof-of-concept project to simulate and study in greater detail the full timeline of formation,” said Vincent Eke, associate professor at the Institute for Computational Cosmology at Durham University and a co-author on the paper. “This will allow us to examine the structure of the disk itself and make more detailed predictions for what the MMX mission could find.”
For Kegerreis, this work is exciting because it also expands our understanding of how moons might be born – even if it turns out that Mars’ own formed by a different route. The simulations offer a fascinating exploration, he says, of the possible outcomes of encounters between objects like asteroids and planets. These events were common in the early solar system, and simulations could help researchers reconstruct the story of how our cosmic backyard evolved.
This research is a collaborative effort between Ames and Durham University, supported by the Institute for Computational Cosmology’s Planetary Giant Impact Research group. The simulations used were run using the open-source SWIFT code, carried out on the DiRAC (Distributed Research Utilizing Advanced Computing) Memory Intensive service (“COSMA”), hosted by Durham University on behalf of the DiRAC High-Performance Computing facility.
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Members of the news media interested in covering this topic should reach out to the NASA Ames newsroom.
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Last Updated Nov 20, 2024 Related Terms
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By NASA
The overarching purpose of the OCKO is to cultivate and sustain a learning culture at Goddard in support of mission success. We have instituted various processes and programs for lessons learned and critical knowledge identification, sharing, and application. The focus of the OCKO is to promote local learning practices that enhances domain-specific expertise within an expanded framework of how NASA works. The Goddard OCKO provides leadership, coordination and support to center organizations to effectively identify lessons and critical knowledge that can be used to support mission execution.
Mission success at Goddard is driven by many factors including, but not limited to, teamwork, leadership, decision making and risk-informed prioritization of lessons. The OCKO has developed many technical case studies that touch on broad organizational issues, project implementation, technology and engineering development, procurement and contract management challenges, and other topics that contribute to mission success. Our learning programs and knowledge sharing activities are designed to transfer the experiences, technical wisdom and values embedded in our policies, procedures and processes.
The OCKO, whether through formal dissenting opinion processes, pause-and-learn exercises, or project reflective learning sessions, encourages our workforce to speak up in support of mission success. We promote a healthy culture where project teams discuss major events, milestones and reviews to ascertain “what happened and why it happened,” how to sustain strengths, and how to improve on weaknesses to enable collective discovery of contextual lessons for institutional learning.
As the Chief Knowledge Officer (CKO) of the NASA Goddard Space Flight Center, it is my sincere desire to help assure that Goddard operates as a learning organization to enhance the likelihood of mission success.
Moses Adoko, Chief Knowledge Officer
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By European Space Agency
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By NASA
Following eight months of intense research, design, and prototyping, six university teams presented their “Inflatable Systems for Lunar Operations” concepts to a panel of judges at NASA’s 2024 Breakthrough, Innovative and Game-Changing (BIG) Idea Challenge forum.
The challenge, funded by NASA’s Space Technology Mission Directorate and Office of STEM Engagement, seeks novel ideas from higher education on a new topic each year and supports the agency’s Lunar Surface Innovation Initiative in developing new approaches and innovative technologies to pave the way for successful exploration on the surface of the Moon. This year, teams were asked to develop low Size, Weight, and Power inflatable technologies, structures and systems that could benefit future Artemis missions to the Moon and beyond.
Taking top honors at this year’s forum receiving the Artemis Award was Northwestern University with National Aerospace Corporation & IMS Engineered Products, with their concept titled METALS: Metallic Expandable Technology for Artemis Lunar Structures. The Artemis Award is given to the team whose concept has the best potential to contribute to and be integrated into an Artemis mission.
The Northwestern University BIG Idea Challenge team developed METALS, an inflatable metal concept for long-term storage of cryogenic fluid on the Moon. The concept earned the Artemis Award, top honors in NASA’s 2024 BIG Idea Challenge.Credit: National Institute of Aerospace The Artemis Award is a generous recognition of the potential impact that our work can have. We hope it can be a critical part of the Artemis Program moving forward. We’re exceptionally grateful to have the opportunity to engage directly with NASA in research for the Artemis Program in such a direct way while we’re still students.”
Julian Rocher
Team co-lead for Northwestern University
METALS is an inflatable system for long term cryogenic fluid storage on the Moon. Stacked layers of sheet metal are welded along their aligned edges, stacked inside a rocket, and inflated once on the lunar surface. The manufacturing process is scalable, reliable, and simple. Notably, METALS boasts superior performance in the harsh lunar environment, including resistance against radiation, abrasion, micrometeorites, gas permeability, and temperature extremes.
Northwestern University team members pose with lunar inflatable prototypes from their METALS project in NASA’s 2024 BIG Idea Challenge. Credit: Northwestern University We learned to ask the right questions, and we learned to question what is the status quo and to go above and beyond and think outside the box. It’s a special mindset for everyone to have on this team… it’s what forces us to innovate.”
Trevor Abbott
Team co-lead for Northwestern University
Arizona State University took home the 2024 BIG Idea Challenge Systems Engineering prize for their project, AEGIS: Inflatable Lunar Landing Pad System. The AEGIS system is designed to deflect the exhaust gasses of lunar landers thereby reducing regolith disturbances generated during landing. The system is deployed on the lunar surface where it uses 6 anchors in its base to secure itself to the ground. Once inflated to its deployed size of 14 m in diameter, AEGIS provides a reusable precision landing zone for incoming landers.
Arizona State University earned the Systems Engineering prize for their BIG Idea Challenge project: AEGIS: Inflatable Lunar Landing Pad System. Arizona State University
This year’s forum was held in tandem with the Lunar Surface Innovation Consortium’s (LSIC) Fall Meeting at the University of Nevada, Las Vegas, where students had the opportunity to network with NASA and industry experts, attend LSIC panels and presentations, and participate in the technical poster session. The consortium provides a forum for NASA to communicate technological requirements, needs, and opportunities, and for the community to share with NASA existing capabilities and critical gaps.
We felt that hosting this year’s BIG Idea Forum in conjunction with the LSIC Fall Meeting would be an exciting opportunity for these incredibly talented students to network with today’s aerospace leaders in government, industry, and academia. Their innovative thinking and novel contributions are critical skills required for the successful development of the technologies that will drive exploration on the Moon and beyond.”
Niki Werkheiser
Director of Technology Maturation in NASA’s Space Technology Mission Directorate
In February, teams submitted proposal packages, from which six finalists were selected for funding of up to $150,000 depending on each team’s prototype and budget. The finalists then worked for eight months designing, developing, and demonstrating their concepts. The 2024 BIG Idea program concluded at its annual forum, where teams presented their results and answered questions from judges. Experts from NASA, Johns Hopkins Applied Physics Laboratory, and other aerospace companies evaluated the student concepts based on technical innovation, credibility, management, and the teams’ verification testing. In addition to the presentation, the teams provided a technical paper and poster detailing their proposed inflatable system for lunar operations.
Year after year, BIG Idea student teams spend countless hours working on tough engineering design challenges. Their dedication and ‘game-changing’ ideas never cease to amaze me. They all have bright futures ahead of them.”
David Moore
Program Director for NASA’s Game Changing Development program
Second-year mechanical engineering student Connor Owens, left, and electrical engineering graduate student Sarwan Shah run through how they’ll test the sheath-and-auger anchor for the axial vertical pull test of the base anchor in a former shower room in Sun Devil Hall. Image credit: Charlie Leight/ASU News The University of Maryland BIG Idea Challenge team’s Auxiliary Inflatable Wheels for Lunar Rover project in a testing environment University of Maryland Students from University of Michigan and a component of their Cargo-BEEP (Cargo Balancing Expandable Exploration Platform) projectUniversity of Michigan Northwestern University welders prepare to work on their 2024 BIG Idea Challenge prototype, a metal inflatable designed for deployment on the Moon.Northwestern University Brigham Young University’s Untethered and Modular Inflatable Robots for Lunar Operations projectBrigham Young University California Institute of Technology’s PILLARS: Plume-deployed Inflatable for Launch and Landing Abrasive Regolith Shielding projectCalifornia Institute of Technology The Inflatable Systems for Lunar Operations theme allowed teams to submit various technology concepts such as soft robotics, deployable infrastructure components, emergency shelters or other devices for extended extravehicular activities, pressurized tunnels and airlocks, and debris shields and dust protection systems. National Institute of Aerospace NASA’s Space Technology Mission Directorate sponsors the BIG Idea Challenge through a collaboration between its Game Changing Development program and the agency’s Office of STEM Engagement. It is managed by a partnership between the National Institute of Aerospace and Johns Hopkins Applied Physics Laboratory.
Team presentations, technical papers, and digital posters are available on the BIG Idea website.
For full competition details, visit: https://bigidea.nianet.org/2024-challenge
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Game Changing Development projects aim to advance space technologies, focusing on advancing capabilities for going to and living in space.
NASA’s Lunar Surface Innovation Initiative
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