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By NASA
Explore This Section Exoplanets Home Exoplanets Overview Exoplanets Facts Types of Exoplanets Stars What is the Universe Search for Life The Big Questions Are We Alone? Can We Find Life? The Habitable Zone Why We Search Target Star Catalog Discoveries Discoveries Dashboard How We Find and Characterize Missions People Exoplanet Catalog Immersive The Exoplaneteers Exoplanet Travel Bureau 5 Ways to Find a Planet Strange New Worlds Universe of Monsters Galaxy of Horrors News Stories Blog Resources Get Involved Glossary Eyes on Exoplanets Exoplanet Watch More Multimedia ExEP This artist’s concept pictures the planets orbiting Barnard’s Star, as seen from close to the surface of one of them. Image credit: International Gemini Observatory/NOIRLab/NSF/AURA/P. Marenfeld The Discovery
Four rocky planets much smaller than Earth orbit Barnard’s Star, the next closest to ours after the three-star Alpha Centauri system. Barnard’s is the nearest single star.
Key Facts
Barnard’s Star, six light-years away, is notorious among astronomers for a history of false planet detections. But with the help of high-precision technology, the latest discovery — a family of four — appears to be solidly confirmed. The tiny size of the planets is also remarkable: Capturing evidence of small worlds at great distance is a tall order, even using state-of-the-art instruments and observational techniques.
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Watching for wobbles in the light from a star is one of the leading methods for detecting exoplanets — planets orbiting other stars. This “radial velocity” technique tracks subtle shifts in the spectrum of starlight caused by the gravity of a planet pulling its star back and forth as the planet orbits. But tiny planets pose a major challenge: the smaller the planet, the smaller the pull. These four are each between about a fifth and a third as massive as Earth. Stars also are known to jitter and quake, creating background “noise” that potentially could swamp the comparatively quiet signals from smaller, orbiting worlds.
Astronomers measure the back-and-forth shifting of starlight in meters per second; in this case the radial velocity signals from all four planets amount to faint whispers — from 0.2 to 0.5 meters per second (a person walks at about 1 meter per second). But the noise from stellar activity is nearly 10 times larger at roughly 2 meters per second.
How to separate planet signals from stellar noise? The astronomers made detailed mathematical models of Barnard’s Star’s quakes and jitters, allowing them to recognize and remove those signals from the data collected from the star.
The new paper confirming the four tiny worlds — labeled b, c, d, and e — relies on data from MAROON-X, an “extreme precision” radial velocity instrument attached to the Gemini Telescope on the Maunakea mountaintop in Hawaii. It confirms the detection of the “b” planet, made with previous data from ESPRESSO, a radial velocity instrument attached to the Very Large Telescope in Chile. And the new work reveals three new sibling planets in the same system.
Fun Facts
These planets orbit their red-dwarf star much too closely to be habitable. The closest planet’s “year” lasts a little more than two days; for the farthest planet, it’s is just shy of seven days. That likely makes them too hot to support life. Yet their detection bodes well in the search for life beyond Earth. Scientists say small, rocky planets like ours are probably the best places to look for evidence of life as we know it. But so far they’ve been the most difficult to detect and characterize. High-precision radial velocity measurements, combined with more sharply focused techniques for extracting data, could open new windows into habitable, potentially life-bearing worlds.
Barnard’s star was discovered in 1916 by Edward Emerson Barnard, a pioneering astrophotographer.
The Discoverers
An international team of scientists led by Ritvik Basant of the University of Chicago published their paper on the discovery, “Four Sub-Earth Planets Orbiting Barnard’s Star from MAROON-X and ESPRESSO,” in the science journal, “The Astrophysical Journal Letters,” in March 2025. The planets were entered into the NASA Exoplanet Archive on March 13, 2025.
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Last Updated Apr 01, 2025 Related Terms
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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
This team from University High School in Irvine, California, won the 2025 regional Oceans Science Bowl, hosted by NASA’s Jet Propulsion Laboratory. From left: Nethra Iyer, Joanne Chen, Matthew Feng, Avery Hexun, Angelina Yan, and coach David Knight.NASA/JPL-Caltech The annual regional event puts students’ knowledge of ocean-related science to the test in a fast-paced academic competition.
A team of students from University High School in Irvine earned first place at a fast-paced regional academic competition focused on ocean science disciplines and hosted by NASA’S Jet Propulsion Laboratory in Southern California.
Eight teams from Los Angeles and Orange counties competed at the March 29 event, dubbed the Los Angeles Surf Bowl. It was the last of about 20 regional competitions held across the U.S. this year in the lead-up to the virtual National Ocean Sciences Bowl finals event in mid-May.
Santa Monica High School earned second place; Francisco Bravo Medical Magnet High School in Los Angeles came in third. With its victory, University repeated its winning performance from last year. The school also won the JPL-hosted regional Science Bowl earlier this month.
Teams from all eight schools that participated in the JPL-hosted 2025 regional Ocean Sciences Bowl pose alongside volunteers and coaches.NASA/JPL-Caltech For the Ocean Sciences Bowl, teams are composed of four to five students and a coach. To prepare for the event, team members spend months answering multiple-choice questions with a “Jeopardy!”-style buzzer in just five seconds. Questions come in several categories, including biology, chemistry, geology, and physics along with related geography, technology, history, policy, and current events topics.
A question in the chemistry category might be “What chemical is the principal source of energy at many of Earth’s hydrothermal vent systems?” (It’s hydrogen sulfide.) Other questions can be considerably more challenging.
When a team member buzzes in and gives the correct answer to a multiple-choice question, the team earns a bonus question, which allows teammates to consult with one another to come up with an answer. More complicated “team challenge questions” prompt students to work together for a longer period. The theme of this year’s competition is “Sounding the Depths: Understanding Ocean Acoustics.”
University High junior Matthew Feng, a return competitor, said the team’s success felt like a payoff for hours of studying together, including on weekends. He keeps coming back to the competition partly for the sense of community and also for the personal challenge, he said. “It’s nice to compete and meet people, see people who were here last year,” Matthew added. “Pushing yourself mentally — the first year I was shaking so hard because I wasn’t used to that much adrenaline.”
Since 2000, JPL’s Public Services Office has coordinated the Los Angeles regional contest with the help of volunteers from laboratory staff and former Ocean Sciences Bowl participants in the local community. JPL is managed for NASA by Caltech.
The National Ocean Sciences Bowl is a program of the Center for Ocean Leadership at the University Corporation for Atmospheric Research, a nonprofit consortium of colleges and universities focused in part on Earth science-related education.
News Media Contact
Melissa Pamer
Jet Propulsion Laboratory, Pasadena, Calif.
626-314-4928
melissa.pamer@jpl.nasa.gov
2025-044
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Last Updated Mar 31, 2025 Related Terms
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By European Space Agency
Video: 00:00:43 Aside from sunlight, the Sun sends out a gusty stream of particles called the solar wind. The ESA-led Solar Orbiter mission is the first to capture on camera this wind flying out from the Sun in a twisting, whirling motion. The solar wind particles spiral outwards as if caught in a cyclone that extends millions of kilometres from the Sun.
Solar wind rains down on Earth's atmosphere constantly, but the intensity of this rain depends on solar activity. More than just a space phenomenon, solar wind can disrupt our telecommunication and navigation systems.
Solar Orbiter is on a mission to uncover the origin of the solar wind. It uses six imaging instruments to watch the Sun from closer than any spacecraft before, complemented by in situ instruments to measure the solar wind that flows past the spacecraft.
This video was recorded by the spacecraft's Metis instrument between 12:18 and 20:17 CEST on 12 October 2022. Metis is a coronagraph: it blocks the direct light coming from the Sun's surface to be able to see the much fainter light scattering from charged gas in its outer atmosphere, the corona.
Metis is currently the only instrument able to see the solar wind's twisting dance. No other imaging instrument can see – with a high enough resolution in both space and time – the Sun's inner corona where this dance takes place. (Soon, however, the coronagraph of ESA's Proba-3 mission might be able to see it too!)
The research paper that features this data, ‘Metis observations of Alfvénic outflows driven by interchange reconnection in a pseudostreamer’ by Paolo Romano et al. was published today in The Astrophysical Journal.
Solar Orbiter is a space mission of international collaboration between ESA and NASA, operated by ESA.
[Technical details: The starting image of the video shows the full view of Solar Orbiter's Metis coronagraph in red, with an image from the spacecraft's Extreme Ultraviolet Imager in the centre (yellow). Zooming to the top left of this view, we see a video derived from Metis observations. The vertical edge of the video spans 1 274 000 km, or 1.83 solar radii. The contrast in the Metis video has been enhanced by using a ‘running difference’ technique: the brightness of each pixel is given by the average pixel brightness of three subsequent frames, minus the average pixel brightness of the three preceding frames. This processing makes background stars appear as horizontal half-dark, half-light lines. Diagonal bright streaks and flashes are caused by light scattering from dust particles close to the coronagraph.]
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By NASA
NASA’s Office of STEM Engagement at Johnson Space Center offers Texas high school students a unique gateway to the world of space exploration through the High School Aerospace Scholars (HAS) program. This initiative gives juniors hands-on experience, working on projects that range from designing spacecraft to planning Mars missions.
Nearly 30 participants who have been hired by NASA in the past five years are HAS alumni. Their stories highlight the program’s impact on students—inspiring innovation, fostering collaboration, unlocking their potential as they move forward into STEM careers.
Discover how the HAS experience has shaped these former students’ space exploration journey.
Jaylon Collins: Designing the Future of Spaceflight
Jaylon Collins always knew he wanted to study the universe but HAS shifted his perspective on what a STEM career could be.
“HAS brought a newfound perspective on what my STEM career could look like, and that shift led me to where I am today,” Collins said. “The coursework, NASA-led seminars, and space exploration research showed me that I could do direct design work to aid humanity’s exploration of the cosmos. I didn’t want to only learn about our universe—I wanted to help explore it.”
Jaylon Collins with his parents at the University of Texas at Austin after being accepted as a student class of 2028. “HAS showed me that a career in STEM doesn’t require a label, only your passion,” Collins said. “I saw that STEM could lead to endless career paths, and the guide was whatever I was most passionate about.”
He saw firsthand how engineers tackle the challenges of spaceflight, from designing spacecraft to solving complex mission scenarios. His strong performance in the program earned him an invitation to Moonshot, a five-day virtual challenge where NASA scientists and engineers mentor students through an Artemis-themed mission. His team developed a Mars sample return mission, an experience that taught him valuable lessons in teamwork.
“We combined our knowledge to design solutions that fit our mission profile, and I learned how problem-solving goes beyond the obvious tools like math and science,” he said. “Instead, it entails finding unique methods that trade off certain elements to bolster others and finding the optimal solution for our problem. HAS taught me to listen more than talk and take constructive feedback to create a solid plan.”
Now studying aerospace engineering at the University of Texas at Austin, Collins credits HAS with building his professional network and opening doors to NASA internship opportunities.
“I learned so much from seminars, my peers, and my Moonshot mentors about not only my academic future but also my prospective career,” he said. “My HAS experience has granted me a web of internship opportunities at NASA through the Gateway Program, and I hope that I can leverage it soon in L’Space Academy’s Lucy Internship.”
Jaylon Collins at Johnson Space Center with the 2024 astronaut graduate class. Collins hopes to contribute to NASA’s mission by developing solutions for deep space travel. Beyond that, he wants to inspire the next generation.
“I believe that the goal of universal knowledge is to reverberate the passions I have onto other curious dreamers,” he said. “Having mentors who teach the curious is the way we progress and innovate as a society, and I am dedicated to being one of those mentors one day.”
Erin Shimoda: Guiding Astronauts to Safety
Erin Shimoda’s path to becoming an aerospace engineer did not start with a clear vision of her future. Growing up in a family full of engineers and scientists, she was already on the STEM path, but she did not know where to focus. HAS changed that.
“HAS exposed me to so many different things that an aerospace engineer does,” she said. “I learned about the history of humans in space, NASA’s missions, how to design 3D models, how to apply equations from math class to real-life scenarios.”
During the program’s summer experience, she and her team designed a mission to send humans to Mars. She credits the program with inspiring her to earn an aerospace engineering degree.
Official portrait of Erin Shimoda. NASA/Josh Valcarcel The HAS program also reshaped her understanding of what a STEM career could look like. “My mentors were incredible. They talked about their projects with such energy and passion. It made me want to feel that way about my own work,” she said. “I didn’t realize before how exciting and innovative working in STEM could be.”
Shimoda said every person she met through HAS was inspiring. “Just knowing that those people existed and worked at NASA helped push me to persevere and succeed in my undergraduate career. I had plenty of bumps in the road, but I had a goal in mind that others had achieved before me, so I knew I could, too.”
One of the biggest lessons she took from the program was the power of collaboration. In high school, she often felt like she was carrying the load on group projects, which left her with a negative view of working on a team. HAS changed that perspective.
“During HAS, everyone was very passionate about accomplishing our goal, so I was consistently supported by my peers,” she said. “That’s so true at NASA, too. Not one single person can build an entire mission to the Moon. We’re all so passionate about accomplishing the mission, so we always support each other and strive for excellence.”
Shimoda also saw firsthand how diverse perspectives lead to better results. “There are many ways to come to a solution, and not every solution is right,” she said. “Collaboration leads to innovation and better problem-solving.”
Erin Shimoda stands in front of a presentation on the Launch Abort System for NASA’s Orion spacecraft and Space Launch System rocket.NASA/Robert Markowitz Now, Shimoda plays a key role in NASA’s Orion Program, ensuring astronaut safety through comprehensive ascent abort planning and procedures, and supporting Artemis recovery operations. She works on guidance, navigation, and control, predicting where the crew module and recovery hardware will land so teams—including the U.S. Navy—are in the right place at the right time.
“It’s exciting because we get to go ‘in the field’ on a U.S. Navy ship during training. Last year, I spent a week on a Navy ship, and seeing everything come together was incredible,” she said.
Her advice for students exploring STEM? “Try every opportunity possible! I joined almost every club imaginable. When I saw the HAS poster in front of my high school’s library, I thought to myself, ‘Well, I’m not in anything space-related yet!’ and the rest is history.”
Looking ahead, she is eager for what is to come. “I’m especially excited for Artemis III, where I’ll be directly involved in recovery operations,” Shimoda said. “I hope that all this work propels us to a future with a sustained human presence on the Moon.”
Hallel Chery: Aspiring Astronaut and Emerging Leader
Hallel Chery is a high school senior who will pursue a degree in mechanical engineering and materials science at Harvard College, with her sights set on becoming both an engineer and an astronaut.
She completed all three stages of HAS: the online course, the virtual Moonshot challenge, and the five-day on-site experience at Johnson. Balancing the program with academics and leading a school-wide tutoring club pushed her limits—but also broadened her confidence.
“I learned that I could take on a tremendous amount of work at one time,” she said. “This realization has helped me become more ambitious in my future plans.”
A portrait of Hallel Chery during her time in the High School Aerospace Scholars program. Moonshot was her proving ground. Tasked with redesigning a module for NASA’s future Gateway lunar space station, she led a team of eight HAS scholars—none of whom she had met before—through an intense, weeklong mission. Their work was presented to NASA scientists and engineers and her group landed among the top teams in the challenge.
“The experience strengthened my confidence in my abilities as a leader,” said Chery. “I learned that I thrive under pressure and am well prepared to tackle any challenge, technical or interpersonal, no matter how difficult it is.”
“Moonshot exposed me for the first time to true, deep teamwork,” she said. “Interacting almost non-stop with the same people over one week in a high stakes situation truly taught me about the dynamics of how teams work, the value of teamwork, and being an effective leader. This, coupled with the program’s emphasis on the importance of teamwork have firmly ingrained in me the essentiality of this core NASA value.”
While at Johnson, Chery toured the Space Vehicle Mockup Facility, watched astronauts suit up at the Neutral Buoyancy Laboratory, and visited the Mission Control Center. “Spending only a few days at Johnson, I can truly say that as an aspiring astronaut, being there felt just like home,” Chery said.
Hallel Chery in a spacesuit mockup at Johnson Space Center. “Because of HAS, I directly visualize myself working in a team to solve the problems I wanted to tackle instead of primarily focusing on the individual accomplishments that will solve them,” she said. “The program taught me how essential teamwork is to effective problem solving and innovation.”
The advice she has for the next generation is to keep exploring and to answer the question: What do you want to contribute for the good of the world?
HAS also introduced her to professional networking early in her academic career. Engaging with NASA professionals provided insight into the agency’s work culture and internship opportunities.
Now, as she prepares for her future in mechanical engineering and materials science, Chery is determined to apply what she has learned.
She is particularly grateful for the mentorship of NASA consultant Gotthard Janson, who provided encouragement and guidance throughout the HAS journey.
“The opportunity to connect with great professionals like him has provided additional wisdom and support as I grow through my academic and professional career,” she said.
Looking ahead, Chery aims to design space habitats, create innovative exercise solutions, and develop advanced materials for use in space.
“I want to help propel humanity forward—on Earth, to the Moon, Mars, and beyond—while inspiring others in the Artemis Generation,” she said. “Building and launching my rocket at Johnson felt like launching my future—one dedicated to contributing to NASA and humanity.”
Johnson Space Center will showcase its achievements at the Texas Capitol for Space Day Texas on Tuesday, March 25. The High School Aerospace Scholars program will have a booth, and NASA will have interactive exhibits highlighting the programs and technologies that will help humanity push forward to the Moon and Mars.
Learn more about NASA’s involvement here.
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