Jump to content

Recommended Posts

  • Publishers
Posted
8 Min Read

How to Contribute to Citizen Science with NASA

A hand holds a cell phone against a landscape of rolling hills and a cloudy sky.
A number of NASA projects use mobile phone apps to put satellite data into the palm of your hand, and allow intrepid citizen scientists to upload data.
Credits:
NASA

A cell phone, a computer—and your curiosity—is all you need to become a NASA citizen scientist and contribute to projects about Earth, the solar system, and beyond.

Science is built from small grains of sand, and you can contribute yours from any corner of the world.

All you need is a cell phone or a computer with an internet connection to begin a scientific adventure. Can you imagine making a pioneering discovery in the cosmos? Want to help solve problems that could improve life on our planet? Or maybe you dream of helping solve an ancient mystery of the universe? All of this is possible through NASA’s Citizen Science program.

NASA defines citizen science, or participatory science, as “science projects that rely on volunteers,” said Dr. Marc Kuchner, an astrophysicist and the Citizen Science Officer in the agency’s Science Mission Directorate in Washington, D.C.

For decades, volunteers have been supporting NASA researchers in different fields and in a variety of ways, depending on the project. They help by taking measurements, sorting data from NASA missions, and deepening our understanding of the universe and our home planet. It all counts.

“That’s science for you: It’s collaborative,” said Kuchner, who oversees the more than 30 citizen science projects NASA offers. “I connect the public and scientists to get more NASA science done.”

Photo of a man standing next to a large projected image of the Disk Detective website
NASA astrophysicist Marc Kuchner is a pioneer in participatory science and today serves as NASA’s Citizen Science program officer. In 2014, Kuchner created the Disk Detective project, which helps NASA scientists study how planets form. Kuchner has also been the principal investigator for some of the agency’s many citizen science projects, but today he oversees the portfolio and promotes volunteer participation around the world.
Credit: David Friedlander

A menu of projects for all tastes

Citizen scientists can come from anywhere in the world—they do not have to be U.S. citizens or residents. Volunteers help NASA look for planets in other solar systems, called exoplanets; sort clouds in Earth’s sky; observe solar eclipses; or detect comets and asteroids. Some of those space rocks are even named after the volunteers who helped find them.

Mass participation is key in initiatives that require as many human eyes as possible. “There are science projects that you can’t do without the help of a big team,” Kuchner said. For example, projects that need large datasets from space telescopes—or “things that are physically big and you need people in different places looking from different angles,” he said.

One example is Aurorasaurus, which invites people to observe and classify northern and southern auroras. “We try to study them with satellites, but it really helps to have people on the ground taking photos from different places at different times,” he explained.

“Part of the way we serve our country and humankind is by sharing not just the pretty pictures from our satellites, but the entire experience of doing science,” Kuchner said.

More than 3 million people have participated in the program. Kuchner believes that shows how much people want to be part of what he calls the “roller coaster” of science. “They want to go on that adventure with us, and we are thrilled to have them.”

The dream of discovering

“You can help scientists who are now at NASA and other organizations around the world to discover interesting things,” said Faber Burgos, a citizen scientist and science communicator from Colombia. “Truth be told, I’ve always dreamed of making history.”

P
Colombian citizen scientist Faber Burgos studied Modern Languages at the Colombian School of Industrial Careers and has a university degree in Classical Archaeology. Today, he is dedicated to disseminating science content through his social media accounts, focusing on children. In 2020, he and his team launched a balloon probe into the stratosphere with a camera that captured the curvature of the Earth, with the aim of demonstrating that the Earth is round. The video of that feat exceeds 97 million views on his Facebook account, earning him a Guinness World Record.
Credit: Courtesy of Faber Burgos

Burgos has been involved in two projects for the past four years: the International Astronomical Search Collaboration (IASC), which searches the sky for potentially dangerous asteroids, and Backyard Worlds: Planet 9. This project uses data from NASA’s now-completed Wide-field Infrared Survey Explorer (WISE) and its follow-up mission, NEOWISE, to search for brown dwarfs and a hypothetical ninth planet.

“There are really amazing participants in this project,” said Kuchner, who helped launch it in 2015. NASA’s WISE and NEOWISE missions detected about 2 billion sources in the sky. “So, the question is: Among those many sources, are any of them new unknowns?” he said.

The project has already found more than 4,000 brown dwarfs. These are Jupiter-sized objects—balls of gas that are too big to be planets, but too small to be stars. Volunteers have even helped discover a new type of brown dwarf.

Participants in the project are also hopeful they’ll find a hypothetical ninth planet, possibly Neptune-sized, in an orbit far beyond Pluto.

Artist's concept of a dark, bluish planet orbiting far from the Sun.
The Backyard Worlds: Planet 9 citizen science project asks volunteers to help search for new objects at the edge of our solar system. The assignment is to review images from NASA’s past WISE and NEOWISE missions in search of two types of astronomical objects: brown dwarfs(balls of gas the same size as  Jupiter that have too little mass to be considered stars) and low-mass stars. Or, even, the hypothetical ninth planet of our Sun, known as Planet nine, or Planet X. The image shows an artist’s rendering of such a hypothetical world orbiting far from the Sun.
Credit: Caltech/R. Hurt (IPAC)
Caltech/R. Hurt (IPAC)

Burgos explained that analyzing the images is easy. “If it’s a moving object, it’s obviously going to be something of interest,” he said. “Usually, when you see these images, everything is still. But if there’s an object moving, you have to keep an eye on it.”

Once a citizen scientist marks the object across the full image sequence, they send the information to NASA scientists to evaluate.

“As a citizen scientist, I’m happy to do my bit and, hopefully, one day discover something very interesting,” he said. “That’s the beauty of NASA—it invites everyone to be a scientist. Here, it doesn’t matter what you are, but your desire to learn.”

The first step

To become a NASA citizen scientist, start by visiting the program’s website. There you’ll find a complete list of available projects with links to their respective sites. Some are available in Spanish and other languages. Many projects are also hosted on the Zooniverse platform, which has been available since 2006.

“Another cool way to get involved is to come to one of our live events,” said Kuchner. These are virtual events open to the public, where NASA scientists present their projects and invite people to participate. “Pick a project you like—and if it’s not fun, pick a different one,” he advised. “There are wonderful relationships to be had if you reach out to scientists and other participants.”

A montage showing several participants in NASA's Space Apps Challenge.
Another way for people to get involved in citizen science is to participate in the annual NASA International Space Apps Challenge, the largest global hackathon. This two-day event creates innovation through international collaboration, providing an opportunity for participants to use NASA’s free and open data and agency partners’ space-based data to tackle real-world problems on Earth and in space. The next NASA International Space Apps Challenge will be October 4-5, 2025.
Credit: NASA

Age is not the limit

People of all ages can be citizen scientists. Some projects are kid-friendly, such as Nemo-Net, an iPad game that invites participants to color coral reefs to help sort them. “I’d like to encourage young people to start there—or try a project with one of the older people in their life,” Kuchner said.

Citizen science can also take place in classrooms. In the Growing Beyond Earth project, teachers and students run experiments on how to grow plants in space for future missions. The IASC project also works with high schools to help students detect asteroids.

Photo of a student watering a plant and tending to 6 small plants inside a pink-illuminated grow box
A student waters small plants inside a Growing Beyond Earth citizen science project grow box.
Credit: NASA

Projects by the community, for the community

GLOBE Observer is another initiative with an international network of teachers and students. The platform offers a range of projects—many in Spanish—that invite people to collect data using their cell phones.

One of the most popular is the GLOBE Mosquito Habitat Mapper, which tracks the migration and spread of mosquitoes that carry diseases. “It’s a way to help save lives—tracking the vectors that transmit malaria and Zika, among others,” Kuchner said.

Other GLOBE projects explore everything from ground cover to cloud types. Some use astronomical phenomena visible to everyone. For example, during the 2024 total solar eclipse, participants measured air temperature using their phones and shared that data with NASA scientists.

The full experience of doing science

No prior studies are needed, but many volunteers go on to collaborate on—or even lead—scientific research. More than 500 NASA citizen scientists have co-authored scientific publications.

One of them is Hugo Durantini Luca, from Córdoba, Argentina, who has participated in 17 published articles, with more on the way. For years, he explored various science projects, looking for one where he could contribute more actively.

stardust.jpg?w=1280&h=720&fit=clip&crop=
Durantini Luca participated in one of NASA’s first citizen science projects, launched in 2006: Stardust at home. Still ongoing, this project invites volunteers to participate in the search for evidence of interstellar dust on the aerogel and aluminum foil collectors returned by NASA’s Stardust mission, using an online virtual microscope.
Credit: NASA

He participated in NASA’s first citizen science project, Stardust@home, which invites users to search for interstellar dust particles in collectors from the Stardust mission, using a virtual microscope.

In 2014, he discovered Disk Detective, a project that searches for disks around stars, where planets may form. By looking at images from the WISE and NEOWISE missions, participants can help understand how worlds are born and how solar systems evolve.

“And, incidentally, if we find planets or some sign of life, all the better,” said Durantini Luca.

Although that remains a dream, they have made other discoveries—like a new kind of stellar disk called the “Peter Pan Disk,” which appears young even though the star it surrounds is not.

Hugo_1.JPG?w=4928&h=3264&fit=clip&crop=f
Durantini Luca participated in one of NASA’s first citizen science projects, launched in 2006: Stardust at home. Still ongoing, this project invites volunteers to participate in the search for evidence of interstellar dust on the aerogel and aluminum foil collectors returned by NASA’s Stardust mission, using an online virtual microscope.
Credit: NASA

Science in person

In 2016, Durantini Luca got the chance to support Disk Detective with his own observations from the southern hemisphere. He traveled to El Leoncito Astronomical Complex (CASLEO), an observatory in San Juan, Argentina. There, he learned to use a spectrograph—an instrument that breaks down starlight to analyze its composition.

He treasures that experience. “Curiously, it was the first time in my life I used a telescope,” he said.

Hugo_3.JPG?w=4928&h=3264&fit=clip&crop=f
In 2016, citizen scientist Hugo Durantini Luca traveled for 18 hours to the El Leoncito Astronomical Complex (CASLEO), at the foot of the Andes Mountains. From there, he made observations of a candidate star of the Disk Detective project.
Credit: Luciano García

While in-person opportunities are rare, both virtual and physical events help build community. Citizen scientists stay in touch weekly through various channels.

“Several of us are friends already—after so many years of bad jokes on calls,” said Durantini Luca.

“People send me pictures of how they met,” said Kuchner. He said the program has even changed how he does science. “It’s changed my life,” he said. “Science is already cool—and this makes it even cooler.”

About the Author

NASA Science Editorial Team

NASA Science Editorial Team

Share

Details

Last Updated
Apr 29, 2025
Keep Exploring

Discover More Topics From NASA

View the full article

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By NASA
      NASA’s Worm logo is displayed in front of the agency’s headquarters in Washington.Credit: NASA Two NASA employees are being  honored as part of the Samuel J. Heyman Service to America Medals, also known as the Sammies, recognizing outstanding federal employees who are addressing many of our country’s greatest challenges.
      Rich Burns of NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and John Blevins of Marshall Space Flight Center in Huntsville, Alabama, were selected out of 350 nominees and are among 23 individuals and teams honored for their achievements as federal employees. They will be recognized at a ceremony in Washington on Tuesday, June 17, that also will be live streamed on the Sammies website. The honorees will be commended via videos and presenter remarks and receive medals for their achievements.
      Named after the founder of the Partnership for Public Service, the 2025 Service to America Medals awards celebrate federal employees who provided critical public services and made outstanding contributions to the health, safety, and national security of our country.
      “Rich and John exemplify the spirit of exploration and service that defines NASA and our nation’s civil servants,” said acting NASA Administrator Janet Petro. “Their leadership, ingenuity, and dedication have not only advanced America’s space program but also inspired the next generation of innovators. We are proud to see their achievements recognized among the very best of federal service.”
      Richard Burns, project manager for the Origins, Spectral Interpretation, Resource Identification, and Security – Regolith Explorer (OSIRIS-REx) at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and honoree of the 2025 Samuel J. Heyman Service to America MedalsCredit: NASA Burns was the project manager of the Origins, Spectral Interpretation, Resource Identification, and Security – Regolith Explorer (OSIRIS-REx) mission to collect a sample from an asteroid and oversaw operations from the developmental stage to the successful landing of the spacecraft’s Sample Return Capsule.
      The mission launched on Sept. 18, 2016, and after a nearly four-year journey, the OSIRIS-REx spacecraft successfully collected a sample from the asteroid Bennu on Oct. 20, 2020, which returned to Earth on Sept. 24, 2023, providing scientists with 120 grams of pristine material to study, the largest amount ever collected from an asteroid. Working to solidify OSIRIS-REx as a success, Burns set up multiple partnerships and communicated frequently with scientists, large and small businesses, NASA centers, and others to ensure the mission’s vision was carried out though each phase.
      During the mission, Burns had to handle unique challenges that required adapting to new situations. These included improving flight software to help the spacecraft avoid hazardous parts of Bennu’s rocky surface and working with NASA leaders to find a way to best protect the sample collected from Bennu after a large stone propped the collection canister open. Finally, when the sample was set to return to Earth, Burns worked extensively with NASA and military partners to prepare for the landing, focusing on the safety of the public along with the integrity of the sample to ensure the final part of the mission was a success.
      Burns helped OSIRIS-REx exceed its objectives all while under the original budget, allowing  NASA to share a portion of the sample with more than 80 research projects and make new discoveries about the possible origins of life on our planet. The spacecraft, now known as Origins, Spectral Interpretation, Resource Identification and Security – Apophis Explorer, is scheduled to rendezvous with the asteroid Apophis in 2029.
      “It’s humbling to accept an award based on the achievements of the amazingly talented, dedicated, and innovative OSIRIS-REx team,” Burns said. “I consider myself privileged to be counted among a team of true explorers who let no obstacle stand in the way of discovery.”
      John Blevins, chief engineer for the SLS (Space Launch System) rocket at NASA’s Marshall Space Flight Center in Huntsville, Alabama, stands inside the Vehicle Assembly Building at Kennedy Space Center in Florida during the stacking of the Artemis I rocket ahead of its first test flight, which successfully launched from Kennedy on Nov. 16, 2022.Credit: NASA Blevins is the chief engineer for the Space Launch System (SLS) rocket and is responsible for the various technical decisions that need to be made to ensure each mission is successful. This included calculating structural needs, thermal analyses of the effects, and studies of vibrations, acoustics, propulsion integration, among other work.
      Artemis I, the first test flight of the SLS rocket, successfully launched from NASA’s Kennedy Space Center in Florida on Nov. 16, 2022. In the time leading up to and during launch, Blevins led the team integrating the hardware for the mission working  to address unexpected events while SLS was on the pad prior to launch. This included significant lightning storms and two hurricanes impacting Kennedy Space Center in Florida.
      Blevins built a working coalition of engineering teams across the agency that previously did not exist. His ability to forge strong relationships on the various teams across the agency allowed for the successful launch of Artemis I. He continues to lead the engineering team behind SLS as they prepare for Artemis II, the second flight of SLS and the first crewed lunar mission of the 21st century.
      “This is a reflection on the hard work and dedication of the entire Artemis Team,” Blevins said. “I am working with an incredibly competent, dedicated team agencywide that goes above and beyond to promote the space exploration goals of our nation. I am honored to accept the award on their behalf.”
      Share
      Details
      Last Updated Jun 16, 2025 EditorTiernan P. DoyleContactTiernan P. Doyletiernan.doyle@nasa.govLocationNASA Headquarters Related Terms
      OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer) Common Exploration Systems Development Division Exploration Systems Development Mission Directorate Goddard Space Flight Center Marshall Space Flight Center OSIRIS-APEX (Origins, Spectral Interpretation, Resource Identification, and Security – Apophis Explorer) Space Launch System (SLS) View the full article
    • By NASA
      3 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      By Beth Ridgeway 
      NASA’s Student Launch competition celebrated its 25th anniversary on May 4, just north of NASA’s Marshall Space Flight Center in Huntsville, Alabama, bringing together more than 980 middle school, high school, college, and university students from across the U.S. to showcase and launch their high-powered rocketry designs.
      The event marked the conclusion of the nine-month challenge where teams designed, built, and launched more than 50 rockets carrying scientific payloads—trying to achieve altitudes between 4,000 and 6,000 feet before executing a successful landing and payload mission.
      “This is really about mirroring the NASA engineering design process,” Kevin McGhaw, director of NASA’s Office of STEM Engagement Southeast Region, said. “It gives students hands-on experience not only in building and designing hardware, but in the review and testing process.  We are helping to prepare and inspire students to get out of classroom and into the aerospace industry as a capable and energizing part of our future workforce.”
      NASA announced James Madison University as the overall winner of the agency’s 2025 Student Launch challenge, followed by North Carolina State University, and The University of Alabama in Huntsville. A complete list of challenge winners can be found on the agency’s Student Launch webpage.
      Participants from James Madison University – the overall winner of the 2025 NASA Student Launch competition – stand around their team’s high-powered rocket as it sits on the pad before launching on May 4 event. NASA/Krisdon Manecke Each year, a payload challenge is issued to the university teams, and this year’s task took inspiration from the agency’s Artemis missions, where NASA will send astronauts to explore the Moon for scientific discovery, economic benefit, and to build the foundation for the first crewed missions to Mars. Teams were challenged to include sensor data from STEMnauts, non-living objects representing astronauts. The STEMnaut “crew” had to relay real-time data to the student team’s mission control, just as the Artemis astronaut crew will do as they explore the lunar surface.  
      Student Launch is one of NASA’s seven Artemis Student Challenges – activities that connect student ingenuity with NASA’s work returning to the Moon under Artemis in preparation for human exploration of Mars.
      The competition is managed by Marshall’s Office of STEM Engagement. Additional funding and support are provided by the Office of STEM Engagement’s Next Generation STEM project, NASA’s Marshall Space Flight Center, the agency’s Space Operations Mission Directorate, Northrup Grumman, National Space Club Huntsville, American Institute of Aeronautics and Astronautics, National Association of Rocketry, Relativity Space, and Bastion Technologies Inc.
      To watch the full virtual awards ceremony, please visit NASA Marshall’s YouTube channel.
      For more information about Student Launch, visit:
      https://www.nasa.gov/learning-resources/nasa-student-launch/
      Share
      Details
      Last Updated Jun 16, 2025 EditorBeth RidgewayLocationMarshall Space Flight Center Related Terms
      Marshall Space Flight Center Find Your Place For Colleges & Universities Learning Resources Explore More
      3 min read NASA Announces Teams for 2025 Student Launch Challenge
      Article 9 months ago 4 min read 25 Years Strong: NASA’s Student Launch Competition Accepting 2025 Proposals
      Article 10 months ago Keep Exploring Discover Related Topics
      Missions
      Humans in Space
      Climate Change
      Solar System
      View the full article
    • By NASA
      2 Min Read NASA Seeks Commercial Feedback on Space Communication Solutions
      An illustration of a commercial space relay ecosystem. Credits: NASA / Morgan Johnson NASA is seeking information from U.S. and international companies about Earth proximity relay communication and navigation capabilities as the agency aims to use private industry satellite communications services for emerging agency science missions.

      “As part of NASA’s Communications Services Project, the agency is working with private industry to solve challenges for future exploration,” said Kevin Coggins, deputy associate administrator of NASA’s SCaN Program. “Through this effort, NASA missions will have a greater ability to command spacecraft, resolve issues in flight, and bring home more data and scientific discoveries collected across the solar system.”

      In November 2024, NASA announced the TDRS (Tracking and Data Relay Satellite) system, the agency’s network of satellites relaying communications from the International Space Station, ground controls on Earth, and spacecraft, will support only existing missions.

      NASA, as one of many customers, will obtain commercial satellite services rather than owning and operating a replacement for the existing satellite system. As NASA transitions to commercial relay services, the agency will leverage commercial capabilities to ensure support for future missions and stimulate private investment into the Earth proximity region. Commercial service offerings could become available to NASA missions as early as 2028 and will continue to be demonstrated and validated through 2031.

      NASA’s SCaN issued a Request for Information on May 30. Responses are due by 5 p.m. EDT on Friday, July 11.

      NASA’s SCaN Program serves as the management office for the agency’s space communications and navigation. More than 100 NASA and non-NASA missions rely on SCaN’s two networks, the Near Space Network and the Deep Space Network, to support astronauts aboard the International Space Station and future Artemis missions, monitor Earth’s weather, support lunar exploration, and uncover the solar system and beyond.

      Learn more about NASA’s SCaN Program at:
      https://www.nasa.gov/scan
      Share
      Details
      Last Updated Jun 16, 2025 EditorJimi RussellContactMolly KearnsLocationGlenn Research Center Related Terms
      Commercial Space General Glenn Research Center The Future of Commercial Space Tracking and Data Relay Satellite (TDRS) Keep Exploring Discover More Topics From NASA
      Communicating with Missions
      Communications Services Project
      Commercial Space News
      Near Space Network

      View the full article
    • By NASA
      A funky effect Einstein predicted, known as gravitational lensing — when a foreground galaxy magnifies more distant galaxies behind it — will soon become common when NASA’s Nancy Grace Roman Space Telescope begins science operations in 2027 and produces vast surveys of the cosmos.
      This image shows a simulated observation from NASA’s Nancy Grace Roman Space Telescope with an overlay of its Wide Field Instrument’s field of view. More than 20 gravitational lenses, with examples shown at left and right, are expected to pop out in every one of Roman’s vast observations. A journal paper led by Bryce Wedig, a graduate student at Washington University in St. Louis, Missouri, estimates that of those Roman detects, about 500 from the telescope’s High-Latitude Wide-Area Survey will be suitable for dark matter studies. By examining such a large population of gravitational lenses, the researchers hope to learn a lot more about the mysterious nature of dark matter.Credit: NASA, Bryce Wedig (Washington University), Tansu Daylan (Washington University), Joseph DePasquale (STScI) A particular subset of gravitational lenses, known as strong lenses, is the focus of a new paper published in the Astrophysical Journal led by Bryce Wedig, a graduate student at Washington University in St. Louis. The research team has calculated that over 160,000 gravitational lenses, including hundreds suitable for this study, are expected to pop up in Roman’s vast images. Each Roman image will be 200 times larger than infrared snapshots from NASA’s Hubble Space Telescope, and its upcoming “wealth” of lenses will vastly outpace the hundreds studied by Hubble to date.
      Roman will conduct three core surveys, providing expansive views of the universe. This science team’s work is based on a previous version of Roman’s now fully defined High-Latitude Wide-Area Survey. The researchers are working on a follow-up paper that will align with the final survey’s specifications to fully support the research community.
      “The current sample size of these objects from other telescopes is fairly small because we’re relying on two galaxies to be lined up nearly perfectly along our line of sight,” Wedig said. “Other telescopes are either limited to a smaller field of view or less precise observations, making gravitational lenses harder to detect.”
      Gravitational lenses are made up of at least two cosmic objects. In some cases, a single foreground galaxy has enough mass to act like a lens, magnifying a galaxy that is almost perfectly behind it. Light from the background galaxy curves around the foreground galaxy along more than one path, appearing in observations as warped arcs and crescents. Of the 160,000 lensed galaxies Roman may identify, the team expects to narrow that down to about 500 that are suitable for studying the structure of dark matter at scales smaller than those galaxies.
      “Roman will not only significantly increase our sample size — its sharp, high-resolution images will also allow us to discover gravitational lenses that appear smaller on the sky,” said Tansu Daylan, the principal investigator of the science team conducting this research program. Daylan is an assistant professor and a faculty fellow at the McDonnell Center for the Space Sciences at Washington University in St. Louis. “Ultimately, both the alignment and the brightness of the background galaxies need to meet a certain threshold so we can characterize the dark matter within the foreground galaxies.”
      To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
      This video shows how a background galaxy’s light is lensed or magnified by a massive foreground galaxy, seen at center, before reaching NASA’s Roman Space Telescope. Light from the background galaxy is distorted, curving around the foreground galaxy and appearing more than once as warped arcs and crescents. Researchers studying these objects, known as gravitational lenses, can better characterize the mass of the foreground galaxy, which offers clues about the particle nature of dark matter.Credit: NASA, Joseph Olmsted (STScI) What Is Dark Matter?
      Not all mass in galaxies is made up of objects we can see, like star clusters. A significant fraction of a galaxy’s mass is made up of dark matter, so called because it doesn’t emit, reflect, or absorb light. Dark matter does, however, possess mass, and like anything else with mass, it can cause gravitational lensing.
      When the gravity of a foreground galaxy bends the path of a background galaxy’s light, its light is routed onto multiple paths. “This effect produces multiple images of the background galaxy that are magnified and distorted differently,” Daylan said. These “duplicates” are a huge advantage for researchers — they allow multiple measurements of the lensing galaxy’s mass distribution, ensuring that the resulting measurement is far more precise.
      Roman’s 300-megapixel camera, known as its Wide Field Instrument, will allow researchers to accurately determine the bending of the background galaxies’ light by as little as 50 milliarcseconds, which is like measuring the diameter of a human hair from the distance of more than two and a half American football fields or soccer pitches.
      The amount of gravitational lensing that the background light experiences depends on the intervening mass. Less massive clumps of dark matter cause smaller distortions. As a result, if researchers are able to measure tinier amounts of bending, they can detect and characterize smaller, less massive dark matter structures — the types of structures that gradually merged over time to build up the galaxies we see today.
      With Roman, the team will accumulate overwhelming statistics about the size and structures of early galaxies. “Finding gravitational lenses and being able to detect clumps of dark matter in them is a game of tiny odds. With Roman, we can cast a wide net and expect to get lucky often,” Wedig said. “We won’t see dark matter in the images — it’s invisible — but we can measure its effects.”
      “Ultimately, the question we’re trying to address is: What particle or particles constitute dark matter?” Daylan added. “While some properties of dark matter are known, we essentially have no idea what makes up dark matter. Roman will help us to distinguish how dark matter is distributed on small scales and, hence, its particle nature.”
      Preparations Continue
      Before Roman launches, the team will also search for more candidates in observations from ESA’s (the European Space Agency’s) Euclid mission and the upcoming ground-based Vera C. Rubin Observatory in Chile, which will begin its full-scale operations in a few weeks. Once Roman’s infrared images are in hand, the researchers will combine them with complementary visible light images from Euclid, Rubin, and Hubble to maximize what’s known about these galaxies.
      “We will push the limits of what we can observe, and use every gravitational lens we detect with Roman to pin down the particle nature of dark matter,” Daylan said.
      The Nancy Grace Roman Space Telescope is managed at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, with participation by NASA’s Jet Propulsion Laboratory in Southern California; Caltech/IPAC in Pasadena, California; the Space Telescope Science Institute in Baltimore; and a science team comprising scientists from various research institutions. The primary industrial partners are BAE Systems, Inc. in Boulder, Colorado; L3Harris Technologies in Melbourne, Florida; and Teledyne Scientific & Imaging in Thousand Oaks, California.
      By Claire Blome
      Space Telescope Science Institute, Baltimore, Md.
      Share
      Details
      Last Updated Jun 12, 2025 EditorAshley BalzerContactAshley Balzerashley.m.balzer@nasa.govLocationNASA Goddard Space Flight Center Related Terms
      Nancy Grace Roman Space Telescope Astrophysics Dark Matter Galaxies Galaxies, Stars, & Black Holes Galaxies, Stars, & Black Holes Research The Universe Explore More
      6 min read NASA’s Roman Mission Shares Detailed Plans to Scour Skies
      Article 2 months ago 5 min read Millions of Galaxies Emerge in New Simulated Images From NASA’s Roman
      Article 2 years ago 6 min read Team Preps to Study Dark Energy via Exploding Stars With NASA’s Roman
      Article 3 months ago View the full article
    • By NASA
      A group of students huddle around two of their classmates using virtual reality headsets to get an up-close view of a rocket during Education Day with the Lake Erie Crushers on Thursday, May 15, 2025. Credit: NASA/Chris Hartenstine NASA’s Glenn Research Center headed to the ballpark for Education Day with the Lake Erie Crushers on May 15. NASA Glenn staff showcased the science of NASA using portable wind tunnel demonstrations, virtual reality simulations, and other interactives inspired by NASA’s Artemis missions.  
      NASA Glenn Research Center engineers Heath Reising, far left, and Dave Saunders, far right, provide a wind tunnel demonstration to a group of aspiring STEM professionals during Education Day with the Lake Erie Crushers on Thursday, May 15, 2025.Credit: NASA/Chris Hartenstine Guests snapped photos at an “out-of-this-world” selfie station and learned how to take the first step toward a career in the aerospace or space industry through NASA’s internship programs. The mid-day game welcomed 3,575 fans, many who came from local schools on field trips for the special day. 
      Return to Newsletter View the full article
  • Check out these Videos

×
×
  • Create New...