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New findings in science, collaborations between public and private space institutions and a defense adjacent report, this week. Having trouble with links? Click the link below to read the unclipped publication. ↓
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IMAGES
A superbubble in the Large Magellanic Cloud : Hubble Space Telescope

A newly released NASA/ESA Hubble image shows LHA 120-N44, or N44, a star‑forming nebula (top-center) in the Large Magellanic Cloud, dominated by a 210‑by‑140‑light‑year superbubble carved by massive stars. Nearly half a million stars were cataloged in the survey, including 30,000 pre‑main‑sequence stars that have yet to begin hydrogen fusion. The compressed shell around the cavity is forming new stars, offering astronomers a detailed look at early stellar evolution in a low‑metallicity environment. (Credit: NASA, ESA/Hubble, D. Gouliermis)
Decagon on Saturn’s South Pole : Hubble Space Telescope

A NASA/ESA Hubble survey has revealed a giant 10‑sided cloud pattern encircling Saturn’s south pole, the first polygonal structure observed there and a counterpart to the long‑studied northern hexagon. The newly identified decagon, spanning 104,250 miles, rotates roughly every 800 days and appears to be shaped by a meandering atmospheric jet, according to a study published Sept. 2 in Science Advances. (Credit: NASA, ESA, A. Sánchez-Lavega (Basque Country University, EHU))

Polar maps from Hubble show Saturn’s south pole from 40°S to 90°S and how the decagon changes over time at two wavelengths. The first column shows the maps at different times. The second column shows maps where the average brightness has been removed, making the decagon easier to see: the troughs appear as bright white spots, and the crests (the corners) show up as darker spots.
By comparing observations taken over several years, researchers found that the pattern has become increasingly distinct since 2023, suggesting they may be witnessing a new atmospheric phenomenon develop on the gas giant, and prompting plans for detailed modeling of its winds, temperatures and three‑dimensional cloud structure. (Credit: NASA, ESA, A. Sánchez-Lavega (Basque Country University, EHU))

Two views of Saturn reveal the evolving 10-sided atmospheric wave encircling the planet’s south pole. (Credit: NASA, ESA, STScI, Agustin Sánchez-Lavega (UPV), Amy Simon (NASA-GSFC), Michael Wong (UC Berkeley); Image Processing: Alyssa Pagan)
A coronal loop arcade on the Sun : Astrophotographer Mark Johnston

Astrophotographer Mark Johnston captured a high‑resolution timelapse on Aug. 21 from Scottsdale, Arizona (U.S.) showing a coronal loop arcade rising above the solar limb. The two‑hour sequence, recorded in hydrogen‑alpha with a TEC160FL refractor, reveals plasma flowing along magnetic field lines, including episodes of coronal rain falling back toward the lower atmosphere. (Credit: Mark Johnston)

The loops were visible nearly side‑on, offering an unusually clear view of their arching structure. Johnston monitors real‑time Solar Dynamics Observatory imagery daily and previously imaged a large plasma cloud in June. The new footage highlights dynamic activity in the sun’s atmosphere as solar cycle conditions intensify. (Credit: Mark Johnston)

SCIENCE
NASA-backed study aims to detect space minerals, mining sites from orbit, without landing

The NASA‑funded Interworld Slingshot Resource Surveys study is assessing whether a single small spacecraft could use one remote‑sensing instrument to survey the Moon, a near‑Earth asteroid and Phobos in one mission. (Credit: Pablo Sobron)
NASA's Innovative Advanced Concepts (NIAC) program has awarded a Phase I grant to Interworld Slingshot Resource Surveys, a concept testing whether Raman spectroscopy can identify minerals and water from orbit or during flybys, rather than after landing.
Led by SETI Institute scientist Pablo Sobron with researchers from NASA Goddard, NASA Ames and OffWorld, the nine-month, $175,000 study will assess whether a single spacecraft with one instrument could survey the moon, a near-Earth asteroid and Mars's moon Phobos over five to eight years. Current Raman instruments, used on Perseverance, work only at close range. Sobron's prior tests reached 120 meters. The team will evaluate whether Raman signals, typically one photon in 10 trillion, can be detected from 30–50 km away and the effort will study photon budgets, pointing, propulsion and detector performance as a precursor to a potential Discovery‑class mission enabling “Landsat‑style” mineral scouting beyond Earth. The concept supports NASA's 2030s lunar base ambitions amid competition with China for helium-3.
Mars's southern interior is hundreds of degrees hotter than north

Artist concept of Mars's warm southern interior. (Credit: NASA / Theophilus Britt Griswold)
A Caltech‑led team has identified a 200–400 °C thermal anomaly beneath Mars’s southern hemisphere, indicating the mantle there is significantly hotter and partially molten compared to the north.
Led by Alexander Berne, a Caltech PhD at the University of Arizona, the team applied a technique called tidal tomography to decades of gravitational data from three NASA Mars orbiters: Global Surveyor, Odyssey and Reconnaissance Orbiter. The finding mirrors Mars's surface dichotomy, where the south's cratered highlands contrast with the north's lowlands, and may explain why NASA's InSight lander detected faster seismic wave dissipation and magnetic anomalies in southern iron minerals.
Researchers say the anomaly could stem from ancient impacts, mantle convection or crustal thickness, offering new constraints on Mars’s hydrology, volcanic history and interior evolution. The finding, published Aug. 27 in Nature
Dark matter detector records its most compelling signal yet

LZ uses a cylindrical chamber full of liquid xenon to search for dark matter. It is surrounded by additional layers to detect or block background particles (left). When a WIMP collides with a xenon atom (right), it emits a flash of light and electrons. The light is detected at the top and bottom of the liquid xenon chamber. An electric field drifts the electrons to the top of the chamber, where they generate a second flash of light. (Credit: Greg Stewart/SLAC National Accelerator Laboratory)
31 August, 2026
The LUX-ZEPLIN (LZ) experiment one of the world's most sensitive dark matter detectors, has recorded a particle interaction that researchers cannot explain with known backgrounds, the most compelling dark matter hint the detector has produced, though not a discovery. LZ, using 10 tonnes of ultrapure liquid xenon nearly a mile underground at South Dakota's Sanford Underground Research Facility (SURF), analyzed 220 days of data from March 2023 to April 2024, probing higher-energy WIMP interactions. WIMPs or weakly interacting massive particles may be what dark matter is made up of.

To search for dark matter, LZ uses photomultiplier tubes (shown here before installation in the detector) to capture light from particle interactions. (Credit: Matthew Kapust/Sanford Underground Research Laboratory)
The signal reached 2.6 sigma, short of the 5-sigma threshold, meaning a 0.5% chance backgrounds explain it. The event falls in the energy range expected for WIMP interactions and would imply a particle mass near 200 proton masses, though the 2.6 sigma result does not meet discovery significance. Lead author Sam Eriksen of the University of Bristol presented the findings at the 2026 TeV Particle Astrophysics conference in Japan, ahead of submission to Physical Review Letters. LZ is an international collaboration of 250 scientists and engineers from 39 institutions.
Starcloud founders' nonprofit plans 80,000-year mission to Alpha Centauri by 2029

A rendering of the planned Fermi Explorer Mission spacecraft, which is targeted to launch toward Alpha Centauri by 2029. (Image credit: Fermi Explorer Mission)
1 September, 2026
A new nonprofit, the Fermi Explorer Mission, announced Sept. 1 plans to launch the first spacecraft deliberately aimed at another star, targeting Alpha Centauri star system, 4.4 light-years away, before the end of 2029. The three-star Alpha Centauri system, is the closest star system to Earth. It consists of the closest individual star Proxima Centauri (Alpha Centauri C), a small red dwarf star that hosts known exoplanets like Proxima b, and Alpha Centauri A and B, the two larger, sun-like stars in the system that form a tight binary pair. Alpha Centauri A is very similar in mass and type to our Sun.
The 80,000-year journey would outlast anyone alive today. NASA's Voyager probes, by contrast, reached interstellar space without aiming at a specific star. Founded by Starcloud co-founders Philip Johnston, Ezra Feilden and Adi Oldean, the project is led day-to-day by Garrett Jameson and advised by former Blue Origin president Rob Meyerson and AstroForge CEO Matt Gialich. The spacecraft, likely 100 to 200 kilograms and using proven electric propulsion, will spiral outward for about 12 years, gaining speed via repeated solar passes before a final burn ejects it at roughly 24 kilometers per second. It will carry at least 1 kilogram of payload, cost under $15 million, and rely on donations. A satellite manufacturer has proposed a design within budget.
Johnston said the idea began with a conversation with another founder who planned to spend $1 billion on an interstellar probe after retirement, "I told him, you could probably do that for like $10 [million] or $15 million," he recalled, and the team frames the mission as a data point on the Fermi Paradox (physicist Enrico Fermi's 1950 question, "Where is everybody?"), succeeding where the laser-sail-based Breakthrough Starshot stalled by using AI lab Physical Superintelligence to design its "perihelion-pump maneuver." Program lead Jameson said the project is built "not to be this thing that will balloon into something that never actually leaves the ground." The craft will lose radio contact after its first year and be tracked via retroreflectors, carry a replica Voyager Golden Record and children's messages gathered through national education ministries, offer $100 donors name-etching, and, Johnston noted, could be followed by a hypothetical $100 million mission to Andromeda.
India's first geosynchronous Earth observation satellite reaches orbit
3 September, 2026
India launched EOS‑05, its first Earth‑imaging satellite bound for geosynchronous orbit, aboard a GSLV Mark II from Satish Dhawan Space Centre on Sept. 3. The three‑stage vehicle placed the 2,367‑kilogram / 5,218-pound spacecraft into sub-geosynchronous transfer orbit 18 minutes after liftoff, marking India’s first successful attempt to send an Earth‑observation payload to GEO.
ISRO said that the satellite will provide persistent coverage of the Indian subcontinent for civilian and military uses. The mission follows a failed PSLV launch in January and Skyroot’s successful private orbital debut in July. GSLV Mark II, now on a five‑launch streak, previously lost an Earth-observing satellite, EOS‑03 in 2021 after a third‑stage anomaly. The rocket has flown 13 times since 2010, with 11 successes.

MILITARY
RAND report warns US space industry can't rebuild military satellites fast enough

Credit: Rand Corporation
31 August, 2026
A RAND report published Aug. 31, "Breaking Glass, Missing Hands," warns that the U.S. lacks enough engineers, technicians and assemblers to rebuild military space assets lost in a war with China or Russia within a 12-to-24-month reconstitution target, versus the decade normally needed to replace an aging satellite. The study, sponsored by Golden Dome director Gen. Michael Guetlein, examines the space defense industrial base's capacity between 2027 and 2032. RAND Project Air Force conducted the study, with Alexandra Gerber as lead author, drawing on federal labor and education data from October 2024 through March 2025 and interviews conducted from May through July 2025. It identifies three shortfalls:
Engineers, of whom about 3% of America's 3 million work in space-supporting industries, filling 7,000 of 208,000 annual openings. RAND's count covers satellite communications, semiconductors and optical-glass manufacturing; aerospace manufacturing was not included. The report attributes part of the shortfall to competition from AI, software and data-analytics employers, which offer higher pay and more flexible work;
Skilled technicians, with 11,000 credentialed annually against 30,000 openings,
Assemblers, at 13,000 against 244,000, a 19-to-1 gap and advanced electro-optical and radiation-hardening specialists, whose 15-year-plus training pipeline is squeezed by clearances averaging six months and by foreign nationals earning 70% of relevant doctorates. Even fully credentialed workers can take up to a year to become productive, the report found, and cleanroom and secure-facility capacity further limits how quickly plants can absorb new hires.
Without steady production, skills atrophy in what interviewees called "surging from zero". Researchers found no consensus that Defense Production Act authorities could backfill the workforce. Existing programs such as the National Imperative for Industrial Skills, the Defense Civilian Training Corps and the Navy's Talent Pipeline Program, offer models but lack coordination and scale. Interviewees rarely cited automation and RAND flagged the gap, noting producers lack volume to justify robotics. RAND recommended $5 million annually for scholarships and outreach, an $800,000 retraining study, surge clauses in contracts, K-12-through-college outreach, National Defense Science and Engineering Graduate fellowships and community-college partnerships in cleanroom and semiconductor training, a proposed Department of War manufacturing institute, and letting Reserve Officers' Training Corps (ROTC) and SMART scholarship recipients fulfill service obligations at space firms, while assigning policy leadership to the Air Force's space acquisition office.
ALL.SPACE and Yank Technologies win new U.S. military contracts
The U.S. Defense Innovation Unit selected ALL.SPACE to scale satellite communications manufacturing, while SpaceWERX awarded Yank Technologies a contract to develop wireless power transfer for satellite servicing.
31 August, 2026
The U.S. Defense Innovation Unit (DIU) has selected ALL.SPACE, now owned by York Space Systems, for an OT agreement under its Adaptive Space Manufacturing and Integration at Scale, or 10ⁿ, program, aimed at address supply chain bottlenecks, speeding U.S. production and deployment of dual-use commercial technologies to produce flight-qualified space hardware on demand.
ALL.SPACE will use its Hydra multi-orbit satellite communications terminal to demonstrate rapid, automated production methods targeting rates of hundreds of units monthly and thousands annually. The company did not disclose the award's value. Hydra terminals link simultaneously to multiple satellite networks across orbits for redundancy. Last year, the Hydra MAX variant reached Technology Readiness Level 6 in U.S. Army trials at Aberdeen Proving Ground, maintaining connections across low, medium and geostationary orbits. ALL.SPACE recently relocated its headquarters from the U.K. to Alabama.

Credit: Yank Technologies
1 September, 2026
SpaceWERX, the Space Force's innovation arm, has awarded Yank Technologies a $75,000 SBIR Phase I contract to develop wireless power transfer for on-orbit satellite servicing. The Brooklyn-based company's resonant inductive technology aims to recharge satellites without mechanical docking, unlike wired connections that require precise alignment. The approach differs from power beaming, used by companies like Starcatcher and Aetherflux, which transmits energy over much longer distances as a laser or microwave beam. Yank's system instead uses short-range magnetic coupling between tuned coils, effective at roughly half a meter to a meter.
CEO Joshua Yankowitz called it one of several servicing options, alongside propellant refueling and robotic servicing, most useful for satellites too damaged to supply power through a compromised interconnect. Yank Technologies must deliver feasibility data by October, which could lead to a roughly $1.2 million follow-on contract for a working unit. The company has also won more than $3 million in NASA lunar-power contracts over the past year, building on work for the U.S. Army.

COMMERCIAL
Quantum imaging, launch and and computing startups land fresh funding rounds
Quantum imaging startup Diffraqtion, Spanish launcher PLD Space, German rocket firm HyImpulse and physics-AI software firm BQP, each closed new funding rounds, spanning quantum imaging for space sensing, reusable orbital rockets, hybrid-propulsion launch vehicles and a physics-AI optimization platform.

Credit: Diffraqtion
31 August, 2026
Quantum imaging startup Diffraqtion raised over $5M from Lockheed Martin Ventures and Sumitomo's Presidio Ventures, pushing total funding past $10M and capping a pre-seed round that also drew SBI US Gateway Fund with Plug and Play, Collaborative Fund and TekVentures. Since a January close, the MIT and University of Maryland spinout has demonstrated its technology at a partner observatory, advanced a DARPA Direct-to-Phase II SBIR, and won a NASA SBIR Phase I for debris tracking plus NASA's $100,000 Space to Soil Challenge.
Diffraqtion builds camera hardware for satellites and ground telescopes that can pick out much finer detail than a conventional lens of the same size, useful for spotting small or closely-spaced objects in orbit, like debris or other spacecraft. Diffraqtion’s quantum cameras capture detail below the normal diffraction limit by sorting incoming light by its shape instead of its brightness. This lets them extract information that standard optical systems discard, reducing the aperture size and onboard computing needed to identify distant objects. Company simulations suggest the technique can resolve features up to 20× smaller, and that its onboard processing classifies targets much faster than conventional pipelines. The method is fully passive and relies on quantum estimation theory (a branch of quantum physics that describes how much information can be extracted from light at the single‑photon level), without qubits, cryogenics or quantum computing hardware.
1 September, 2026
Spanish launch startup PLD Space has extended its Series C funding round by €108 million ($125 million), bringing the round to €288 million ($335 million) and the company's cumulative funding to €488 million. Mitsubishi Electric led the extension, as it did the round's original €180 million close in March. Spain's state-backed investment company, COFIDES returned as an investor, joined by new backers Endeavor Catalyst and the sovereign Spain Oman Private Equity Fund, managed by MCH Private Equity. The capital will fund industrialization and commercialization of Miura 5, a two-stage reusable rocket for small satellites, including added manufacturing, testing and launch infrastructure. PLD Space, which launched Europe's first fully private rocket in 2023, plans Miura 5's debut from Europe's Spaceport in Kourou, French Guiana, before year's end.

The maiden launch of the German aerospace company HyImpulse's SR75 suborbital hybrid-propellant sounding rocket took place from Southern Launch's Koonibba Test Range in South Australia on May 3, 2024. (Credit: HyImpulse)
2 September, 2026
German launch provider HyImpulse has extended its Series A round by more than €50 million ($58 million), taking total company funding past €125 million. The extension was co-led by JOIN Capital and Ace Capital Partners, with new backers North Ventures, BW-Capital, Bayern Kapital and the German Aerospace Center joining alongside returning investor Campus Founders Ventures.
HyImpulse, which raised its initial Series A in October 2025, says it has secured an order book exceeding €350 million. The Heilbronn-based company will use the funding to prepare a second flight of its suborbital SR75 rocket, from SaxaVord Spaceport in Scotland before year's end, and the maiden flight of its three-stage SL1 orbital rocket, a hybrid-propulsion vehicle designed to carry payloads up to 600kg to orbit.
2 September, 2026
New York-based startup BQP (formerly BosonQ Psi) has raised investment from IBM Ventures, lifting total funding to $8 million alongside participation from Venn10 Capital and Monta Vista Capital. The round follows a New York State-backed 2025 seed. Funding will move BQP's physics-AI optimization platform, BQPhy, from engineering design into operational deployment and expand it beyond its initial aerospace and defense focus into energy.
BQP develops physics‑acceleration software that uses quantum algorithms to speed mission‑critical engineering simulations and real‑time operational decisions. The BQPhy platform blends physics‑based AI with optimization tools to significantly accelerate complex workloads on existing CPU and GPU systems while positioning customers for future quantum hardware.
BQP says contracted and committed revenue has grown eightfold, its customer base has tripled and platform users have grown 20-fold since the seed round. Under an SBIR with the U.S. Space Force and SpaceWERX, BQPhy propagates a catalog of more than 3,000 space objects in under a second, about 250 times faster than the open-source Orekit solver.
EU, ESA and NASA award new satellite and Mars communications contracts to OHB, Creotech and Blue Origin
The European Union, European Space Agency and NASA awarded new contracts to OHB, Creotech Instruments and Blue Origin for EU's IRIS² satellite connectivity, space weather monitoring and Mars communications infrastructure.
31 August, 2026
German space and technology company OHB has signed a contract worth nearly €1 billion with SES to build 18 medium Earth orbit satellite platforms for the European Union's IRIS² secure connectivity constellation, the first major industrial order since the €15.6 billion program's implementation phase began August 6. SES leads the MEO segment within the SpaceRISE consortium, which also includes Eutelsat, leading the 330-satellite LEO segment, and Hispasat, responsible for the ground segment.
IRIS², the EU's third flagship program after Galileo and Copernicus, will field 348 satellites across LEO and MEO. Each MEO satellite will have a launch mass of about 2.6 metric tons. SES expects to invest up to €1.35 billion in the segment. First satellites are planned for 2029, with services beginning in 2030.

Credit: Creotech
1 September, 2026
Polish satellite maker Creotech Instruments has signed a €13.9 million ($16 million) European Space Agency contract for end-to-end delivery of the SAWA, 2nd Space Weather Nanosat mission, the first Polish mission delivered to ESA under a "mission-as-a-service" model. The contract covers mission phases B through E and includes an option to extend data service two years for about €1.9 million more.
Built on Creotech's HyperSat platform, the satellite will monitor space weather from low Earth orbit for up to three years, tracking geomagnetic storms and particle emissions that threaten satellites, navigation and power systems, under ESA's Space Safety Programme. Partners include the Polish Academy of Sciences' Space Research Centre, Wrocław University of Science and Technology, and N7 Space. Launch is planned for 2029.

A Blue Origin animation showing its Mars Telecommunications Network orbiter at the Red Planet. (Credit: Blue Origin)
1 September, 2026
NASA has selected Blue Origin to build the Mars Telecommunications Network, a next-generation communications and navigation relay for Mars missions, under a contract worth up to $700 million. Blue Origin beat Rocket Lab and must deliver the spacecraft to NASA by Dec. 31, 2028, with the network expected operational at Mars by 2030.
The company will design, develop, integrate, launch and operate the orbiter on its Blue Ring platform, which has flown only as an uncrewed prototype on New Glenn's January 2025 debut. NASA currently relies on two aging orbiters, Mars Odyssey and Mars Reconnaissance Orbiter, plus ESA's Mars Express and Trace Gas Orbiter, to relay rover data while also gathering their own science; MTN will be a dedicated relay.
China's Galactic Energy and Germany's Isar Aerospace notch new launch milestones
China's Galactic Energy debuted its reusable Pallas-1 rocket, and Germany's Isar Aerospace reached orbit with Spectrum, marking the first orbital launch from Western European soil.

Galactic Energy’s Pallas-1 Y1 vehicle lifting off from the Jiuquan Satellite Launch Center. (Credit: Galactic Energy)
31 August, 2026
Beijing-based launch startup Galactic Energy's Pallas-1 or Zhishenxing-1 (Zhishenxing is the Chinese astronomical name for the asteroid Pallas or the goddess Pallas Athena) rocket completed its maiden flight on Aug 31, lifting off from the Jiuquan Satellite Launch Center in northwest China and reaching its planned orbit, the company said. The two-stage, 171-foot rocket can carry about 15,400 pounds / 7000 kgs to orbit and combines solid and liquid propellants through a dual-engine design. Galactic Energy did not disclose the payloads, if any. There was no landing attempt.
The reusable first stage, designed for 25 flights with grid fins and deployable legs like Falcon 9's, will first attempt recovery in the second half of 2027. Pallas‑1 will follow two other Chinese vehicles who have also landed stages this year. The Long March 10B’s first stage touched down in a ship‑borne net on July 10, and Zhuque‑3 landed on legs on Aug. 18. Galactic Energy also operates the Ceres-1 launcher, with 23 flights to date.

For this second Spectrum launch Isar Aerospace included six commercial and educational CubeSats and an experiment. (Credit: Isar Aerospace)
5 September, 2026
Isar Aerospace's Spectrum rocket reached orbit Sept. 5 from Andøya Space Center in Norway, becoming the first orbital launch from Western European soil. The two-stage, 28-meter rocket lifted off and, seven minutes later, settled into an elliptical orbit, deploying several small payloads after a circularization burn.
It was Spectrum's second flight and the first, in March 2025, crashed under a minute after launch following a vent valve failure and loss of attitude control. The German company can carry about 2,200 pounds / 1000 kgs to orbit and says its Munich-area factory can build more than 30 rockets a year. The flight completed the first milestone of ESA's European Launcher Challenge, which requires an orbital launch by 2027, and was backed by ESA's Boost! program.
Russia's Plesetsk Cosmodrome has hosted orbital launches from Russian soil (about 25% of which lies in Europe) for roughly six decades.
York Space Systems enters very low Earth orbit satellite market, launches new LX/V-Class satellite platform

A rendering of York Space's satellite bus for operations in very low Earth orbit. (Credit: York Space)
2 September, 2026
York Space Systems has introduced the LX/V-Class, its lowest-altitude satellite platform yet, built for sustained very low Earth orbit (vLEO) missions. Adapted from the company's S- and LX-Class buses, it can carry about 300 kilograms of payload as low as 200 kilometers, using a new high-thrust electric propulsion system from York subsidiary Orbion Space Technology. The design builds on York's BANE mission, which demonstrated communications and attitude control at that altitude.
CEO Dirk Wallinger said a 300-kilometer floor suits government buyers' needs, while rivals including Florida-based Redwire and India-based Bellatrix Aerospace chase lower altitudes. York can deliver satellites six to seven months after contract signing, backed by its recent acquisitions of ALL.SPACE and ATLAS Space Operations and over $755 million in production investment.

RESEARCH SPOTLIGHT
New study maps seven stages of a meteorite's fall to Earth

A stony meteorite in NASA Ames Research Center's Arcjet Interaction Heating Facility. A thin black line outlines the holder that supports the stone (left). Air flow is from left to right. Melt flows from the meteorite surface and a thin shock wave is visible in front of the stone. (Credit: Photo: NASA Ames/SETI Institute, courtesy of Zev Hoover and Ron Dantowitz, Dexter Southfield Schools/MARS Scientific)
Researchers have identified seven distinct phases that space rocks pass through as they fall to Earth as meteorites, finding that melting and fragmentation, not evaporation, control how rocks lose mass and slow down. The findings, based on 75 documented meteorite falls, were published in Meteoritics & Planetary Science by a team led by Peter Jenniskens of the SETI Institute and NASA Ames Research Center.
A falling rock forms a shock wave, glows as a meteor, then brightens into a fireball that can lose up to 40 percent of its mass through melting before fragmenting, at around 60 km altitude, under far lower pressure than previously estimated. Breakup proceeds earlier than expected due to pre‑existing cracks, and intact rear surfaces can channel fragments into narrow fall lines. Jenniskens said the same phases applied to the 20-meter asteroid behind 2013's Chelyabinsk airburst, aiding assessments of hazardous asteroids.
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