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By NASA
X-ray: NASA/CXC/Northwestern Univ./F. Yusef-Zadeh et al; Radio: NRF/SARAO/MeerKat; Image Processing: NASA/CXC/SAO/N. Wolk Astronomers have discovered a likely explanation for a fracture in a huge cosmic “bone” in the Milky Way galaxy, using NASA’s Chandra X-ray Observatory and radio telescopes.
The bone appears to have been struck by a fast-moving, rapidly spinning neutron star, or pulsar. Neutron stars are the densest known stars and form from the collapse and explosion of massive stars. They often receive a powerful kick from these explosions, sending them away from the explosion’s location at high speeds.
Enormous structures resembling bones or snakes are found near the center of the galaxy. These elongated formations are seen in radio waves and are threaded by magnetic fields running parallel to them. The radio waves are caused by energized particles spiraling along the magnetic fields.
X-ray: NASA/CXC/Northwestern Univ./F. Yusef-Zadeh et al; Radio: NRF/SARAO/MeerKat; Image Processing: NASA/CXC/SAO/N. Wolk This new image shows one of these cosmic “bones” called G359.13142-0.20005 (G359.13 for short), with X-ray data from Chandra (colored blue) and radio data from the MeerKAT radio array in South Africa (colored gray). Researchers also refer to G359.13 as the Snake.
Examining this image closely reveals the presence of a break, or fracture, in the otherwise continuous length of G359.13 seen in the image. The combined X-ray and radio data provides clues to the cause of this fracture.
Astronomers have now discovered an X-ray and radio source at the location of the fracture, using the data from Chandra and MeerKAT and the National Science Foundation’s Very Large Array. A likely pulsar responsible for these radio and X-ray signals is labeled. A possible extra source of X-rays located near the pulsar may come from electrons and positrons (the anti-matter counterparts to electrons) that have been accelerated to high energies.
The researchers think the pulsar likely caused the fracture by smashing into G359.13 at a speed between one million and two million miles per hour. This collision distorted the magnetic field in the bone, causing the radio signal to also become warped.
At about 230 light-years long, G359.13 is one of the longest and brightest of these structures in the Milky Way. To put this into context, there are more than 800 stars within that distance from Earth. G359.13 is located about 26,000 light-years from Earth, near the center of the Milky Way.
A paper describing these results appeared in the May 2024 issue of the Monthly Notices of the Royal Astronomical Society and is available here. The authors of the study are Farhad Yusuf-Zadeh (Northwestern University), Jun-Hui Zhao (Center for Astrophysics | Harvard & Smithsonian), Rick Arendt (University of Maryland, Baltimore County), Mark Wardle (Macquarie University, Australia), Craig Heinke (University of Alberta), Marc Royster (College of the Sequoias, California), Cornelia Lang (University of Iowa), and Joseph Michail (Northwestern).
NASA’s Marshall Space Flight Center in Huntsville, Alabama, 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.
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Learn more about the Chandra X-ray Observatory and its mission here:
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Visual Description
This release features two composite images of a long, thin, cosmic structure. With the structure’s vertical orientation, seemingly fragile dimensions, and pale grey color against the blackness of space, the images resemble medical X-rays of a long, thin, bone. The main image shows the structure in its entirety. The inset image is an annotated close-up highlighting an apparent fracture in the bone-like structure.
The structure, called G359.13, or “The Snake”, is a Galactic Center Filament. These filament formations are threaded by parallel magnetic fields, and spiraling, energized particles. The particles cause radio waves, which can be detected by radio arrays, in this case by the MeerKAT array in South Africa.
In the first composite image, the largely straight filament stretches from the top to the bottom of the vertical frame. At each end of the grey filament is a hazy grey cloud. The only color in the image is neon blue, found in a few specks which dot the blackness surrounding the structure. The blue represents X-rays seen by NASA’s Chandra X-ray Observatory.
In the annotated close-up, one such speck appears to be interacting with the structure itself. This is a fast-moving, rapidly spinning neutron star, otherwise known as a pulsar. Astronomers believe that this pulsar has struck the filament halfway down its length, distorting the magnetic field and radio signal.
In both images, this distortion resembles a small break, or spur, in the bone-like filament.
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Chandra X-ray Center
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617-496-7998
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Lane Figueroa
Marshall Space Flight Center, Huntsville, Alabama
256-544-0034
lane.e.figueroa@nasa.gov
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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 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 4 Min Read Hubble Provides New View of Galactic Favorite
NASA/ESA Hubble Space Telescope image of the Sombrero Galaxy, also called Messier 104. Credits:
ESA/Hubble & NASA, K. Noll As part of ESA/Hubble’s 35th anniversary celebrations, the European Space Agency (ESA) is sharing a new image series revisiting stunning, previously released Hubble targets with the addition of the latest Hubble data and new processing techniques.
ESA/Hubble published a new image of NGC 346 as the first installment in the series. Now, they are revisiting a fan-favorite galaxy with new image processing techniques. The new image reveals finer detail in the galaxy’s disk, as well as more background stars and galaxies.
Over the past two decades, Hubble has released several images of the Sombrero Galaxy, including this well-known Hubble image from October 2003. In November 2024, the NASA/ESA/CSA James Webb Space Telescope also provided an entirely new perspective on this striking galaxy.
Located around 30 million light-years away in the constellation Virgo, the Sombrero Galaxy is instantly recognizable. Viewed nearly edge on, the galaxy’s softly luminous bulge and sharply outlined disk resemble the rounded crown and broad brim of the Mexican hat from which the galaxy gets its name.
NASA/ESA Hubble Space Telescope image of the Sombrero Galaxy, also called Messier 104. ESA/Hubble & NASA, K. Noll Though packed with stars, the Sombrero Galaxy is surprisingly not a hotbed of star formation. Less than one solar mass of gas is converted into stars within the knotted, dusty disk of the galaxy each year. Even the galaxy’s central supermassive black hole, which at nine billion solar masses is more than 2,000 times more massive than the Milky Way’s central black hole, is fairly calm.
The galaxy is too faint to spot with the unaided eye, but it is readily viewable with a modest amateur telescope. Seen from Earth, the galaxy spans a distance equivalent to roughly one-third the diameter of the full Moon. The galaxy’s size on the sky is too large to fit within Hubble’s narrow field of view, so this image is actually a mosaic of several images stitched together.
One of the things that makes this galaxy especially notable is its viewing angle, which is inclined just six degrees off of the galaxy’s equator. From this vantage point, intricate clumps and strands of dust stand out against the brilliant white galactic nucleus and bulge, creating an effect not unlike Saturn and its rings — but on an epic galactic scale.
At the same time, this extreme angle makes it difficult to discern the structure of the Sombrero Galaxy. It’s not clear whether it’s a spiral galaxy, like our own Milky Way, or an elliptical galaxy. Curiously, the galaxy’s disk seems like a fairly typical disk for a spiral galaxy, and its spheroidal bulge and halo seem fairly typical for an elliptical galaxy — but the combination of the two components resembles neither a spiral nor an elliptical galaxy.
Researchers used Hubble to investigate the Sombrero Galaxy, measuring the metals (what astronomers call elements heavier than helium) in stars in the galaxy’s expansive halo. This type of measurement can help astronomers better understand a galaxy’s history, potentially revealing whether it merged with other galaxies in the past. In the case of the Sombrero Galaxy, extremely metal-rich stars in the halo point to a possible merger with a massive galaxy several billion years ago. An ancient galactic clash, hinted at by Hubble’s sensitive measurements, could explain the Sombrero Galaxy’s distinctive appearance.
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.
Facebook logo @NASAHubble @NASAHubble Instagram logo @NASAHubble Explore Hubble Sombrero Galaxy Images and Science
Sombrero Galaxy
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Hubble’s Messier Catalog: M104 (Sombrero Galaxy)
Hubble easily resolves some of the Sombrero Galaxy’s roughly 2,000 globular clusters.
Beyond the Brim, Sombrero Galaxy’s Halo Suggests Turbulent Past
Surprising new data from NASA’s Hubble Space Telescope suggests the smooth, settled “brim” of the Sombrero galaxy’s disk may be concealing a turbulent past.
Heritage Project Celebrates Five Years of Harvesting the Best Images from Hubble Space Telescope
The Hubble Heritage Project released more than 65 images of dazzling celestial objects, including planets, dying stars, regions of star formation, clusters of stars, individual galaxies, and even clusters of galaxies.
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Last Updated Apr 16, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Contact Media Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov
Bethany Downer
ESA/Hubble
bethany.downer@esahubble.org
Garching, Germany
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Hubble’s 35th Anniversary celebrations ESA/Hubble’s 35th Anniversary celebrations Release on ESA’s website
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Hubble Space Telescope
Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.
Galaxy Details and Mergers
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Hubble’s 35th Anniversary
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By NASA
1 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA astronaut Douglas Hurley is helped out of the SpaceX Crew Dragon Endeavour spacecraft onboard the SpaceX GO Navigator recovery ship after he and NASA astronaut Robert Behnken landed in the Gulf of Mexico off the coast of Pensacola, Florida, Sunday, Aug. 2, 2020. The Demo-2 test flight for NASA’s Commercial Crew Program was the first to deliver astronauts to the International Space Station and return them safely to Earth onboard a commercially built and operated spacecraft. Behnken and Hurley returned after spending 64 days in space. Photo Credit: (NASA/Bill Ingalls)NASA New spacecraft that will transport crews to the Lunar and Martian surfaces and return them to Earth may have diverse landing modalities which will function in different landing environments. Additionally, the crew may be deconditioned on landing, impacting their ability to independently egress the vehicles, perform post-landing tasks in a timely manner, and perform surface EVAs post-landing -including those required for emergencies.
Boeing and NASA teams work around Boeing’s CST-100 Starliner spacecraft after it landed at White Sands Missile Range’s Space Harbor, Wednesday, May 25, 2022, in New Mexico. Boeing’s Orbital Flight Test-2 (OFT-2) is Starliner’s second uncrewed flight test to the International Space Station as part of NASA’s Commercial Crew Program. OFT-2 serves as an end-to-end test of the system’s capabilities. Photo Credit: (NASA/Bill Ingalls) Directed Acyclic Graph Files
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Last Updated Mar 11, 2025 EditorRobert E. LewisLocationJohnson Space Center Related Terms
Human Health and Performance Human System Risks Explore More
1 min read Risk of Toxic Substance Exposure
Article 15 mins ago 1 min read Risk of Urinary Retention
Article 15 mins ago 1 min read Risk to Crew Health Due to Electrical Shock (Electrical Shock Risk)
Article 15 mins ago Keep Exploring Discover More Topics From NASA
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By USH
Despite the MSM at the moment keeps a low profile in informing the public about the unidentified drones, the 'drone mystery' is still going on with hundreds of drones spotted across the US, especially the eastern United States.
Check out the size of this high-tech drone, estimated to be around 25-30 feet in length, possibly even larger. It was recently filmed flying low over New Jersey. (Watch the video of the craft at the bottom of the article.)
The mystery surrounding unidentified drones continues to capture attention, particularly across the eastern United States. While mainstream media (MSM) maintains a low profile in reporting on these occurrences, sightings persist, with hundreds of drones reported in various regions.
Officials have repeatedly assured the public that these drones pose no threat to national security. However, skepticism remains high, as the government has yet to provide a comprehensive explanation, leaving many feeling left in the dark.
Dr. Steven Greer recently made a prediction during an interview with Newsmax's Rob Finnerty. He claimed that the drone crisis is likely to escalate "within the next 30 days." According to Greer, the notion of a supposed "alien invasion" is a deliberate distraction designed to obscure the true nature of extraterrestrial encounters, which he asserts have been ongoing for decades. This statement has sparked further speculation among those following developments in the UFO community.
Adding to the anticipation, investigative journalist Ross Coulthart has forecasted that 2025 will mark a turning point in public awareness about extraterrestrial matters. Describing the current period as “the calm before the storm,” Coulthart envisions transformative revelations in the coming year.
Michael Salla, Ph.D., another figure in the disclosure movement, has reported information from a retired U.S. Army serviceman, identified as JP. According to JP, factions within the U.S. military, referred to as "White Hats," along with an international coalition known as the “Earth Alliance,” are preparing to disclose advanced alien technology to the public. This advanced technology, allegedly hidden for decades by shadowy "deep state" organizations and defense contractors, includes three medium-sized cigar-shaped spacecraft and numerous unidentified aerial phenomena (UAPs) stored in an underground facility in Tampa, Florida. These alleged alien-tech craft are said to possess advanced stealth capabilities, allowing them to blend seamlessly with their surroundings.
As part of a broader disclosure strategy, the unveiling of these craft is intended to prepare the public for even larger extraterrestrial revelations in the months ahead.
It seems as two opposing forces are at play:
The Deep State: Allegedly leveraging drones and orbs sightings as part of a staged operation to manipulate public perception to fabricate the illusion of an alien invasion in an attempt to hide the real truth about extraterrestrial encounters and maintain the secrecy around covert programs and maintain control over advanced technologies acquired over the past 70 years.
The Earth Alliance: Seeking to reveal genuine alien technology obtained from real UFO crashes, confirming the existence of extraterrestrial life and promoting transparency.
Whether these predictions will materialize remains to be seen, but they have undeniably heightened public interest in what lies ahead. View the full article
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By NASA
Download PDF: Contact Dynamics Predictions Utilizing theNESC Parameterless Contact Model
Modeling the capture of the Mars Sample Return (MSR) Orbiting Sample (OS) involves understanding complex dynamic behavior, which includes the OS making contact against the interior of the capture enclosure. The MSR Program required numerical verification of the contact dynamics’ predictions produced using their commercial software tools. This commercial software used “free” parameters to set up the contact modeling. Free parameters (also known as free variables) are not based on contact physics. The commercial contact model used by MSR
required seven free parameters including a Hertzian contact stiffness, surface penetration, stiffening exponent, penetration velocity, contact damping, maximum penetration depth for the contact damping value, and a smoothing function. An example of a parameter that is not free is coefficient of friction, which is a physics-based parameter. Consider the free parameter, contact stiffness. Contact stiffness is already present in the finite element model’s (FEM) stiffness matrix where the bodies come into contact, and surface penetration is disallowed in a physically realizable contact model, as FEM meshes should not penetrate one another during contact (i.e., the zero-contact limit penetration constraint condition).
As such, with each set of selected free parameters generating a different contact force signature, additional numerical verification is required to guide setting these parameters. Contact modeling is nonlinear. This means that the stiffness matrices of contacting bodies are continuously updated as the bodies come into contact, potentially recontact (due to vibrations), and disengage. The modal properties of contacting bodies continuously change with state transitions (e.g., stick-to-slip). Some contact models have been proposed and incorporated in commercial finite element analysis solvers, and most involve static loading. A relatively smaller number involve dynamics, which has historically proven challenging.
In 2005, NASA conducted a study testing several commercial contact solvers in predicting contact forces in transient dynamic environments. This was necessitated by the Space Shuttle Program (SSP)—after the February 2003 Columbia accident— deciding to include contact dynamics in the Space Shuttle transient coupled loads analysis (CLA) to capture the impact of contact nonlinearities. This rendered the entire CLA nonlinear. The study found major difficulties executing nonlinear CLAs in commercial software. A nonlinear solver developed by the NESC and Applied Structural Dynamics (ASD) that was able to produce physically realizable results was numerically verified by NASA and later experimentally validated as well. This nonlinear solver was subsequently utilized to execute all NASA SSP CLAs (i.e., crewed space flights) from 2005 to the final flight in 2011, as well as currently supporting the SLS Program.
The objective of the MSR contact verification work was to provide data that could be used by the MSR team to help define the free parameters listed above for the commercial tool contact model. The NESC/ASD solver was used to model contact between simple cantilever and free beams, deriving contact forces and relative displacements. These resulting data can be used to determine parameter values for more complex structures. Two of the modeled configurations, one for axial contact (Figure 1) and the other for stick/friction (Figure 2), and sample results from the NESC nonlinear dynamic analyses are presented in Figures 1 and 2.
For information, contact:
Dr. Dexter Johnson dexter.johnson@nasa.gov
Dr. Arya Majed arya.majed@nasa.gov
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