Jump to content

Models for Facilitating Government-Funded Activities in the Post-ISS LEO Ecosystem


Recommended Posts

  • Publishers
Posted

1 min read

Preparations for Next Moonwalk Simulations Underway (and Underwater)

NASA astronauts Christina Koch and Andrew Morgan
NASA astronauts Christina Koch and Andrew Morgan stow biological research samples into a science freezer located inside the U.S. Destiny laboratory module.

In September 2022, the National Space Council directed NASA to “develop a plan for the next generation microgravity national lab in a commercial space station world.” NASA has been working to develop this strategy, to include considerations for establishing robust international partner pathways outlined in a report from NASA’s Office of Technology, Policy, and Strategy titled “Models for Facilitating Government-Funded Activities in the Post-International Space Station (ISS) Low-Earth Orbit (LEO) Ecosystem,” as one step in NASA’s effort to define and develop a comprehensive strategy. 

Share

Details

Last Updated
Dec 20, 2023
Editor
Bill Keeter

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 European Space Agency
      Astronomers have discovered a huge filament of hot gas bridging four galaxy clusters. At 10 times as massive as our galaxy, the thread could contain some of the Universe’s ‘missing’ matter, addressing a decades-long mystery.
      View the full article
    • By NASA
      3 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      Artist concept highlighting the novel approach proposed by the 2025 NIAC awarded selection of the Mapping Sub-cm Orbital Debris in LEO concept.NASA/Christine Hartzell Christine Hartzell
      University of Maryland, College Park
      The proposed investigation will address key technological challenges associated with a previously funded NIAC Phase I award titled “On-Orbit, Collision-Free Mapping of Small Orbital Debris”. Sub-cm orbital debris in LEO is not detectable or trackable using conventional technologies and poses a major hazard to crewed and un-crewed spacecraft. Orbital debris is a concern to NASA, as well as commercial and DoD satellite providers. In recent years, beginning with our NIAC Phase I award, we have been developing the idea that the sub-cm orbital debris environment may be monitored by detecting the plasma signature of the debris, rather than optical or radar observations of the debris itself. Our prior work has shown that sub-cm orbital debris may produce plasma solitons, which are a type of wave in the ionosphere plasma that do not disperse as readily as traditional waves. Debris may produce solitons that are co-located with the debris (called pinned solitons) or that travel ahead of the debris (called precursor solitons). We have developed computational models to predict the characteristics of the plasma solitons generated by a given piece of debris. These solitons may be detectable by 12U smallsats outfitted with multi-needle Langmuir probes.
      In this Phase II NIAC award, we will address two key technical challenges that significantly effect the value of soliton-based debris detection: 1. Develop an algorithm to constrain debris size and speed based on observed soliton characteristics. Our prior investigations have produced predictions of soliton characteristics as a function of debris characteristics. However, the inverse problem is not analytically solvable. We will develop machine learning algorithms to address this challenge. 2. Evaluate the feasibility and value of detecting soliton velocity. Multiple observations of the same soliton may allow us to constrain the distance that the soliton has traveled from the debris. When combined with the other characteristics of the soliton and knowledge of the local plasma environment, back propagation of the soliton in plasma simulations may allow us to extract the position and velocity vectors of the debris. If it is possible to determine debris size, position and velocity from soliton observations, this would provide a breakthrough in space situational awareness for debris that is currently undetectable using conventional technology. However, even if only debris size and speed can be inferred from soliton detections, this technology is still a revolutionary improvement on existing methods of characterizing the debris flux, which provide data only on a multi-year cadence. This proposed investigation will answer key technological questions about how much information can be extracted from observed soliton signals and trade mission architectures for complexity and returned data value. Additionally, we will develop a roadmap to continue to advance this technology.
      2025 Selections
      Facebook logo @NASATechnology @NASA_Technology


      Share
      Details
      Last Updated May 27, 2025 EditorLoura Hall Related Terms
      NIAC Studies NASA Innovative Advanced Concepts (NIAC) Program Keep Exploring Discover More NIAC Topics
      Space Technology Mission Directorate
      NASA Innovative Advanced Concepts
      NIAC Funded Studies
      About NIAC
      View the full article
    • By NASA
      5 min read
      Percolating Clues: NASA Models New Way to Build Planetary Cores
      NASA’s Perseverance rover was traveling in the channel of an ancient river, Neretva Vallis, when it captured this view of an area of scientific interest nicknamed “Bright Angel” – the light-toned area in the distance at right. The area features light-toned rocky outcrops that may represent either ancient sediment that later filled the channel or possibly much older rock that was subsequently exposed by river erosion. NASA/JPL-Caltech A new NASA study reveals a surprising way planetary cores may have formed—one that could reshape how scientists understand the early evolution of rocky planets like Mars.
      Conducted by a team of early-career scientists and long-time researchers across the Astromaterials Research and Exploration Science (ARES) Division at NASA’s Johnson Space Center in Houston, the study offers the first direct experimental and geochemical evidence that molten sulfide, rather than metal, could percolate through solid rock and form a core—even before a planet’s silicate mantle begins to melt.
      For decades, scientists believed that forming a core required large-scale melting of a planetary body, followed by heavy metallic elements sinking to the center. This study introduces a new scenario—especially relevant for planets forming farther from the Sun, where sulfur and oxygen are more abundant than iron. In these volatile-rich environments, sulfur behaves like road salt on an icy street—it lowers the melting point by reacting with metallic iron to form iron-sulfide so that it may migrate and combine into a core. Until now, scientists didn’t know if sulfide could travel through solid rock under realistic planet formation conditions.
      Working on this project pushed us to be creative. It was exciting to see both data streams converge on the same story.
      Dr. Jake Setera
      ARES Scientist with Amentum
      The study results gave researchers a way to directly observe this process using high-resolution 3D imagery—confirming long-standing models about how core formation can occur through percolation, in which dense liquid sulfide travels through microscopic cracks in solid rock.
      “We could actually see in full 3D renderings how the sulfide melts were moving through the experimental sample, percolating in cracks between other minerals,” said Dr. Sam Crossley of the University of Arizona in Tucson, who led the project while a postdoctoral fellow with NASA Johnson’s ARES Division. “It confirmed our hypothesis—that in a planetary setting, these dense melts would migrate to the center of a body and form a core, even before the surrounding rock began to melt.”
      Recreating planetary formation conditions in the lab required not only experimental precision but also close collaboration among early-career scientists across ARES to develop new ways of observing and analyzing the results. The high-temperature experiments were first conducted in the experimental petrology lab, after which the resulting samples—or “run products”—were brought to NASA Johnson’s X-ray computed tomography (XCT) lab for imaging.
      A molten sulfide network (colored gold) percolates between silicate mineral grains in this cut-out of an XCT rendering—rendered are unmelted silicates in gray and sulfides in white. Credit: Crossley et al. 2025, Nature Communications X-ray scientist and study co-author Dr. Scott Eckley of Amentum at NASA Johnson used XCT to produce high-resolution 3D renderings—revealing melt pockets and flow pathways within the samples in microscopic detail. These visualizations offered insight into the physical behavior of materials during early core formation without destroying the sample.
      The 3D XCT visualizations initially confirmed that sulfide melts could percolate through solid rock under experimental conditions, but that alone could not confirm whether percolative core formation occurred over 4.5 billion years ago. For that, researchers turned to meteorites.
      “We took the next step and searched for forensic chemical evidence of sulfide percolation in meteorites,” Crossley said. “By partially melting synthetic sulfides infused with trace platinum-group metals, we were able to reproduce the same unusual chemical patterns found in oxygen-rich meteorites—providing strong evidence that sulfide percolation occurred under those conditions in the early solar system.”
      To understand the distribution of trace elements, study co-author Dr. Jake Setera, also of Amentum, developed a novel laser ablation technique to accurately measure platinum-group metals, which concentrate in sulfides and metals.
      “Working on this project pushed us to be creative,” Setera said. “To confirm what the 3D visualizations were showing us, we needed to develop an appropriate laser ablation method that could trace the platinum group-elements in these complex experimental samples. It was exciting to see both data streams converge on the same story.”
      When paired with Setera’s geochemical analysis, the data provided powerful, independent lines of evidence that molten sulfide had migrated and coalesced within a solid planetary interior. This dual confirmation marked the first direct demonstration of the process in a laboratory setting.
      Dr. Sam Crossley welds shut the glass tube of the experimental assembly. To prevent reaction with the atmosphere and precisely control oxygen and sulfur content, experiments needed to be sealed in a closed system under vacuum. Credit: Amentum/Dr. Brendan Anzures The study offers a new lens through which to interpret planetary geochemistry. Mars in particular shows signs of early core formation—but the timeline has puzzled scientists for years. The new results suggest that Mars’ core may have formed at an earlier stage, thanks to its sulfur-rich composition—potentially without requiring the full-scale melting that Earth experienced. This could help explain longstanding puzzles in Mars’ geochemical timeline and early differentiation.
      The results also raise new questions about how scientists date core formation events using radiogenic isotopes, such as hafnium and tungsten. If sulfur and oxygen are more abundant during a planet’s formation, certain elements may behave differently than expected—remaining in the mantle instead of the core and affecting the geochemical “clocks” used to estimate planetary timelines.
      This research advances our understanding of how planetary interiors can form under different chemical conditions—offering new possibilities for interpreting the evolution of rocky bodies like Mars. By combining experimental petrology, geochemical analysis, and 3D imaging, the team demonstrated how collaborative, multi-method approaches can uncover processes that were once only theoretical.
      Crossley led the research during his time as a McKay Postdoctoral Fellow—a program that recognizes outstanding early-career scientists within five years of earning their doctorate. Jointly offered by NASA’s ARES Division and the Lunar and Planetary Institute in Houston, the fellowship supports innovative research in astromaterials science, including the origin and evolution of planetary bodies across the solar system.
      As NASA prepares for future missions to the Moon, Mars, and beyond, understanding how planetary interiors form is more important than ever. Studies like this one help scientists interpret remote data from spacecraft, analyze returned samples, and build better models of how our solar system came to be.
      For more information on NASA’s ARES division, visit: https://ares.jsc.nasa.gov/
      Victoria Segovia
      NASA’s Johnson Space Center
      281-483-5111
      victoria.segovia@nasa.gov
      Share








      Details
      Last Updated May 22, 2025 Related Terms
      Astromaterials Planetary Science Planetary Science Division The Solar System Explore More
      6 min read NASA’s Dragonfly Mission Sets Sights on Titan’s Mysteries


      Article


      2 hours ago
      4 min read Eclipses, Auroras, and the Spark of Becoming: NASA Inspires Future Scientists


      Article


      1 week ago
      6 min read NASA Observes First Visible-light Auroras at Mars


      Article


      1 week ago
      Keep Exploring Discover More Topics From NASA
      Planetary Science Stories



      Astromaterials



      Latest NASA Science News



      Solar System


      View the full article
    • By NASA
      6 Min Read NASA’s Chandra Releases New 3D Models of Cosmic Objects
      New three-dimensional (3D) models of objects in space have been released by NASA’s Chandra X-ray Observatory. These 3D models allow people to explore — and print — examples of stars in the early and end stages of their lives. They also provide scientists with new avenues to investigate scientific questions and find insights about the objects they represent.
      These 3D models are based on state-of-the-art theoretical models, computational algorithms, and observations from space-based telescopes like Chandra that give us accurate pictures of these cosmic objects and how they evolve over time.
      However, looking at images and animations is not the only way to experience this data. The four new 3D printable models of Cassiopeia A (Cas A), G292.0+1.8 (G292), Cygnus Loop supernova remnants, and the star known as BP Tau let us experience the celestial objects in the form of physical structures that will allow anyone to hold replicas of these stars and their surroundings and examine them from all angles.
      Cassiopeia A (Cas A)
      Using NASA’s James Webb Space Telescope, astronomers uncovered a mysterious feature within the remnant, nicknamed the “Green Monster,” alongside a puzzling network of ejecta filaments forming a web of oxygen-rich material. When combined with X-rays from Chandra, the data helped astronomers shed light on the origin of the Green Monster and revealed new insights into the explosion that created Cas A about 340 years ago, from Earth’s perspective.
      To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
      3D Model of Cassiopeia A "Green Monster" INAF-Osservatorio Astronomico di Palermo/Salvatore Orlando To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
      3D Model of Cassiopeia AINAF-Osservatorio Astronomico di Palermo/Salvatore Orlando BP Tau
      X-ray: NASA/CXC/SAO; Optical: PanSTARRS; Image Processing: NASA/CXC/SAO/N. Wolk This 3D model shows a star less than 10 million years old that is surrounded by a disk of material. This class of objects is known as T Tauri stars, named after a young star in the Taurus star-forming region. The model describes the effects of multiple flares, or outbursts that are detected in X-rays by Chandra from one T Tauri star known as BP Tau. These flares interact with the disk of material and lead to the formation of an extended outer atmosphere composed by hot loops, connecting the disk to the developing star.
      To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
      3D Model of BP TauINAF-Osservatorio Astronomico di Palermo/Salvatore Orlando Cygnus Loop
      X-ray: NASA/SAO/CXC; Optical: John Stone (Astrobin); Image Processing: NASA/SAO/CXC/L. Frattre, N. Wolk The Cygnus Loop (also known as the Veil Nebula) is a supernova remnant, the remains of the explosive death of a massive star. This 3D model is the result of a simulation describing the interaction of a blast wave from the explosion with an isolated cloud of the interstellar medium (that is, dust and gas in between the stars). Chandra sees the blast wave and other material that has been heated to millions of degrees. The Cygnus Loop is a highly extended, but faint, structure on the sky: At three degrees across, it has the diameter of six full moons.
      To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
      3D Model of Cygnus LoopINAF-Osservatorio Astronomico di Palermo/Salvatore Orlando G292.0+1.8
      X-ray: NASA/CXC/SAO; Optical:NSF/NASA/DSS; Image Processing This is a rare type of supernova remnant observed to contain large amounts of oxygen. The X-ray image of G292.0+1.8 from Chandra shows a rapidly expanding, intricately structured field left behind by the shattered star. By creating a 3D model of the system, astronomers have been able to examine the asymmetrical shape of the remnant that can be explained by a “reverse” shock wave moving back toward the original explosion.
      To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
      3D Model of G292.0+1.8INAF-Osservatorio Astronomico di Palermo/Salvatore Orlando The 3D models here are the subject of several scholarly papers by Salvatore Orlando of INAF in Palermo, Italy, and colleagues published in The Astrophysical Journal, Astronomy & Astrophysics, and Monthly Notices of the Royal Astronomical Society. Much of this work is also publicly available work on SketchFab.
      NASA’s Marshall Space Flight Center manages the Chandra program. The Smithsonian Astrophysical Observatory’s Chandra X-ray Center controls science operations from Cambridge, Massachusetts, and flight operations from Burlington, Massachusetts.
      Read more from NASA’s Chandra X-ray Observatory.
      Learn more about the Chandra X-ray Observatory and its mission here:
      https://www.nasa.gov/chandra
      https://chandra.si.edu
      Visual Description
      This release features visualizations of three supernova remnants and one star. Each is rendered as a composite image, and as a digital 3-dimensional model, presented in separate short video clips. The composite images are two dimensional and static, but the digital models rotate, showcasing their three-dimensionality.
      The first featured supernova is Cassiopeia A. In the X-ray, optical, and infrared composite image, the debris from an exploded star resembles a round purple gas cloud, marbled with streaks of golden light. In the rotating, 3D model, the purple gas cloud is depicted as a flat disk, like a record or CD. Bursting out the front and back of the disk is an orange and white shape similar to a ball of coral, or a head of cauliflower lined with stubby tendrils. Most of the ball, and the majority of the tendrils, appear on one side of the disk. On the opposite side, the shape resembles dollops of thick whipped cream.
      Next in the release is a star known as BP Tau. BP Tau is a developing star, less than 10 million years old, and prone to outbursts or flares. These flares interact with a disk of material that surrounds the young star, forming hot loops of extended atmosphere. In the composite image, BP Tau resembles a distant, glowing white dot surrounded by a band of pink light. The rotating, 3D model is far more dynamic and intriguing! Here, the disk of material resembles a large blue puck with round, ringed, concave surfaces. At the heart of the puck is a small, glowing red orb: the developing star. Shooting out of the orb are long, thin, green strands: the flares. Also emerging from the orb are orange and pink petal-shaped blobs: the loops of extended atmosphere. Together, the orb, strands, and petals resemble an exotic flowering orchid.
      The third celestial object in this release is the supernova remnant called Cygnus Loop. In the composite image, the remnant resembles a wispy cloud in oranges, blues, purples, and whites, shaped like a backwards letter C. The 3D model examines this cloud of interstellar material interacting with the superheated, supernova blast wave. In the 3D model, the Cygnus Loop resembles a bowl with a thick base, and a wedge cut from the side like a slice of pie. The sides of the bowl are rendered in swirled blues and greens. However, inside the thick base, revealed by the wedge-shaped cut, are streaks of red and orange. Surrounding the shape are roughly parallel thin red strands, which extend beyond the top and bottom of the digital model.
      The final supernova featured in this release is G292.0+1.8. The composite image depicts the remnant as a bright and intricate ball of red, blue, and white X-ray gas and debris set against a backdrop of gleaming stars. In the 3D model, the remnant is rendered in translucent icy blue and shades of orange. Here, the rotating shape is revealed to be somewhat like a bulbous arrowhead, or perhaps an iceberg on its side.
      News Media Contact
      Megan Watzke
      Chandra X-ray Center
      Cambridge, Mass.
      617-496-7998
      mwatzke@cfa.harvard.edu
      Lane Figueroa
      Marshall Space Flight Center, Huntsville, Alabama
      256-544-0034
      lane.e.figueroa@nasa.gov
      About the Author
      Lee Mohon

      Share
      Details
      Last Updated Apr 16, 2025 Related Terms
      Chandra X-Ray Observatory Astrophysics General Marshall Astrophysics Marshall Space Flight Center Supernova Remnants The Universe Explore More
      4 min read Hubble Provides New View of Galactic Favorite
      As part of ESA/Hubble’s 35th anniversary celebrations, the European Space Agency (ESA) is sharing a new…
      Article 5 hours ago 3 min read NASA Sees Progress on Blue Origin’s Orbital Reef Design Development
      Article 6 hours ago 1 min read Why Do We Grow Plants in Space?
      Article 1 day ago Keep Exploring Discover More Topics From NASA
      Missions
      Humans in Space
      Climate Change
      Solar System
      View the full article
    • By NASA
      Explore Hubble Hubble Home Overview About Hubble The History of Hubble Hubble Timeline Why Have a Telescope in Space? Hubble by the Numbers At the Museum FAQs Impact & Benefits Hubble’s Impact & Benefits Science Impacts Cultural Impact Technology Benefits Impact on Human Spaceflight Astro Community Impacts Science Hubble Science Science Themes Science Highlights Science Behind Discoveries Hubble’s Partners in Science Universe Uncovered Explore the Night Sky Observatory Hubble Observatory Hubble Design Mission Operations Missions to Hubble Hubble vs Webb Team Hubble Team Career Aspirations Hubble Astronauts News Hubble News Hubble News Archive Social Media Media Resources Multimedia Multimedia Images Videos Sonifications Podcasts e-Books Online Activities Lithographs Fact Sheets Posters Hubble on the NASA App Glossary More 35th Anniversary Online Activities 5 Min Read NASA’s Hubble Provides Bird’s-Eye View of Andromeda Galaxy’s Ecosystem
      A view of the distribution of known satellite galaxies orbiting the large Andromeda galaxy (M31), located 2.5 million light-years away.  Credits:
      NASA, ESA, Alessandro Savino (UC Berkeley), Joseph DePasquale (STScI), Akira Fujii DSS2 Located 2.5 million light-years away, the majestic Andromeda galaxy appears to the naked eye as a faint, spindle-shaped object roughly the angular size of the full Moon. What backyard observers don’t see is a swarm of nearly three dozen small satellite galaxies circling the Andromeda galaxy, like bees around a hive.
      These satellite galaxies represent a rambunctious galactic “ecosystem” that NASA’s Hubble Space Telescope is studying in unprecedented detail. This ambitious Hubble Treasury Program used observations from more than a whopping 1,000 Hubble orbits. Hubble’s optical stability, clarity, and efficiency made this ambitious survey possible. This work included building a precise 3D mapping of all the dwarf galaxies buzzing around Andromeda and reconstructing how efficiently they formed new stars over the nearly 14 billion years of the universe’s lifetime.
      This is a wide-angle view of the distribution of known satellite galaxies orbiting the large Andromeda galaxy (M31), located 2.5 million light-years away. The Hubble Space Telescope was used to study the entire population of 36 mini-galaxies circled in yellow. Andromeda is the bright spindle-shaped object at image center. All the dwarf galaxies seem to be confined to a plane, all orbiting in the same direction. The wide view is from ground-based photography. Hubble’s optical stability, clarity, and efficiency made this ambitious survey possible. Hubble close up snapshots of four dwarf galaxies are on image right. The most prominent dwarf galaxy is M32 (NGC 221), a compact ellipsoidal galaxy that might be the remnant core of a larger galaxy that collided with Andromeda a few billion years ago. NASA, ESA, Alessandro Savino (UC Berkeley), Joseph DePasquale (STScI), Akira Fujii DSS2 In the study published in The Astrophysical Journal, Hubble reveals a markedly different ecosystem from the smaller number of satellite galaxies that circle our Milky Way. This offers forensic clues as to how our Milky Way galaxy and Andromeda have evolved differently over billions of years. Our Milky Way has been relatively placid. But it looks like Andromeda has had a more dynamic history, which was probably affected by a major merger with another big galaxy a few billion years ago. This encounter, and the fact that Andromeda is as much as twice as massive as our Milky Way, could explain its plentiful and diverse dwarf galaxy population.
      Surveying the Milky Way’s entire satellite system in such a comprehensive way is very challenging because we are embedded inside our galaxy. Nor can it be accomplished for other large galaxies because they are too far away to study the small satellite galaxies in much detail. The nearest galaxy of comparable mass to the Milky Way beyond Andromeda is M81, at nearly 12 million light-years.
      This bird’s-eye view of Andromeda’s satellite system allows us to decipher what drives the evolution of these small galaxies. “We see that the duration for which the satellites can continue forming new stars really depends on how massive they are and on how close they are to the Andromeda galaxy,” said lead author Alessandro Savino of the University of California at Berkeley. “It is a clear indication of how small-galaxy growth is disturbed by the influence of a massive galaxy like Andromeda.”
      “Everything scattered in the Andromeda system is very asymmetric and perturbed. It does appear that something significant happened not too long ago,” said principal investigator Daniel Weisz of the University of California at Berkeley. “There’s always a tendency to use what we understand in our own galaxy to extrapolate more generally to the other galaxies in the universe. There’s always been concerns about whether what we are learning in the Milky Way applies more broadly to other galaxies. Or is there more diversity among external galaxies? Do they have similar properties? Our work has shown that low-mass galaxies in other ecosystems have followed different evolutionary paths than what we know from the Milky Way satellite galaxies.”
      For example, half of the Andromeda satellite galaxies all seem to be confined to a plane, all orbiting in the same direction. “That’s weird. It was actually a total surprise to find the satellites in that configuration and we still don’t fully understand why they appear that way,” said Weisz.
      To view this video please enable JavaScript, and consider upgrading to a web browser that
      supports HTML5 video
      This animation begins with a view of the neighboring Andromeda galaxy. We zoom through a scattering of foreground stars and enter the inky blackness of intergalactic space. We cross 2.5 million light-years to reach the Andromeda system, consisting of 36 dwarf satellite galaxies orbiting the giant spindle-shaped Andromeda galaxy at image center. An ambitious survey by the Hubble Space Telescope was made to plot the galaxy locations in three-dimensional space. In this video we circle around a model of the Andromeda system based on real Hubble observational data. NASA, ESA, Christian Nieves (STScI), Alessandro Savino (UC Berkeley); Acknowledgment: Joseph DePasquale (STScI), Frank Summers (STScI), Robert Gendler The brightest companion galaxy to Andromeda is Messier 32 (M32). This is a compact ellipsoidal galaxy that might just be the remnant core of a larger galaxy that collided with Andromeda a few billion years ago. After being gravitationally stripped of gas and some stars, it continued along its orbit. Galaxy M32 contains older stars, but there is evidence it had a flurry of star formation a few billion years ago. In addition to M32, there seems to be a unique population of dwarf galaxies in Andromeda not seen in the Milky Way. They formed most of their stars very early on, but then they didn’t stop. They kept forming stars out of a reservoir of gas at a very low rate for a much longer time.
      “Star formation really continued to much later times, which is not at all what you would expect for these dwarf galaxies,” continued Savino. “This doesn’t appear in computer simulations. No one knows what to make of that so far.”
      “We do find that there is a lot of diversity that needs to be explained in the Andromeda satellite system,” added Weisz. “The way things come together matters a lot in understanding this galaxy’s history.”
      Hubble is providing the first set of imaging where astronomers measure the motions of the dwarf galaxies. In another five years Hubble or NASA’s James Webb Space Telescope will be able to get the second set of observations, allowing astronomers to do a dynamical reconstruction for all 36 of the dwarf galaxies, which will help astronomers to rewind the motions of the entire Andromeda ecosystem billions of years into the past.
      The Hubble Space Telescope has been operating for over three decades and continues to make ground-breaking discoveries that shape our fundamental understanding of the universe. Hubble is a project of international cooperation between NASA and ESA (European Space Agency). NASA’s Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope and mission operations. Lockheed Martin Space, based in Denver, also supports mission operations at Goddard. The Space Telescope Science Institute in Baltimore, which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science operations for NASA.
      Explore More

      NASA’s Hubble Traces Hidden History of Andromeda Galaxy


      Hubble’s High-Definition Panoramic View of the Andromeda Galaxy


      Explore the Night Sky: Messier 31


      Hubble’s Galaxies

      Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Media Contact:
      Claire Andreoli (claire.andreoli@nasa.gov)
      NASA’s Goddard Space Flight Center, Greenbelt, Maryland
      Ray Villard
      Space Telescope Science Institute, Baltimore, Maryland
      Science Contact:
      Alessandro Savino
      University of California, Berkeley, California
      Share








      Details
      Last Updated Feb 27, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
      Hubble Space Telescope Andromeda Galaxy Astrophysics Astrophysics Division Galaxies Goddard Space Flight Center Spiral Galaxies Keep Exploring Discover More Topics From Hubble
      Hubble Space Telescope


      Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.


      Galaxy Details and Mergers



      Reshaping Our Cosmic View: Hubble Science Highlights



      Hubble’s Night Sky Challenge


      View the full article
  • Check out these Videos

×
×
  • Create New...