Not all meteorites are created equal, and one that crashed through the roof of a New Jersey home is giving scientists a rare glimpse into the chemistry of an ancient asteroid while offering new clues to the puzzle of how life began on Earth.

On July 16, 2024, a daytime meteor streaked across the sky and produced a sonic boom as it passed south of the Statue of Liberty.

“A forensic study of the fragments revealed that they contained preserved bits from near the surface of a primitive asteroid where it experienced concentrated salty fluids—a process not previously known from this type of proto-planet world,” said lead author and meteor astronomer Peter Jenniskens of the SETI Institute and NASA’s Ames Research Center in California’s Silicon Valley in a statement.

Two years later, after analyzing fragments from the event, researchers found that the meteorite contained evidence of ancient salty fluids, complex organic chemistry, and processes that occurred on a primitive asteroid billions of years ago.

Daytime meteor (left), impact site, and a fragment of the Hillsborough meteorite (Image Credit: (A) M. Kirschner and M. Hankey, American Meteor Society; [(B) to (D)] A. Gordon/SETI Institute).The findings, published in the journal Science Advances, come from an international team led by meteor astronomer Peter Jenniskens of the SETI Institute and NASA Ames Research Center.

“Our cameras in Northford, Connecticut, and Douglassville, Pennsylvania, as well as a doorbell camera in Wayne, New Jersey, captured the meteor, and from that we measured its trajectory,” said American Meteor Society operations manager Mike Hankey. 

Traveling at approximately 32,000 miles per hour (14.4 kilometers per second), witnesses from the surrounding areas, including New York, New Jersey, Connecticut, Rhode Island, and Pennsylvania, reported seeing a bright fireball that broke apart while a part of it broke through the roof of a New Jersey residence.

“The path traced back to low in the asteroid belt,” Hankey adds. 

Using footage from meteor cameras, including systems in Connecticut and Pennsylvania, researchers reconstructed the meteor’s path. The trajectory traced back to a region of the asteroid belt between Mars and Jupiter. The space rock disappeared from view about 22 miles above the surface. Shortly afterward, weather radar at Newark Airport detected a cloud of falling debris stretching from Staten Island into New Jersey. 

The homeowner acted quickly, handling the space rock with gloves and aluminum foil before placing it in a glass container to protect the material from contamination.

The meteorite was classified as a CM1/2 carbonaceous chondrite, a rare type of primitive meteorite known for containing organic compounds and evidence of water weathering. 

According to researchers, the Hillsborough meteorite is only the second witnessed fall of a CM1/2 carbonaceous chondrite ever recorded. Most known CM meteorites belong to the less-altered CM2 category, while no CM1-type meteorite fall has ever been observed.

“A high fraction of compounds were the product of organic chemistry with minerals,” said organic mass spectrometry specialist Phil Schmitt-Kopplin of Technical University Munich. “We do not know if these magnesium organic compounds were contributed by brine chemistry or were simply left over from earlier impact shock processes.”

The final analysis showed tiny salt-rich pockets inside the meteorite, pointing to a formation where water once evaporated on its parent asteroid, leaving behind highly saline fluids. Scientists are comparing these minerals with samples from the asteroids Ryugu and Bennu to better understand early solar system chemistry.

These ancient salty waters may have helped protect and change the molecules needed for life before life first began. The meteorite contained carbon, nitrogen, amino acids, and other organic compounds, many of which appear to have formed through interactions between water, minerals, and carbon-rich chemistry.

“We are thrilled that nature delivered such a precious asteroid sample on our doorstep,” said curator Denton Ebel from the Department of Earth and Planetary Sciences at the American Museum of Natural History.

The recent paper, “Meteor over New York City: Brines in a primitive CM asteroid,” appeared in the journal Science.

Chrissy Newton is a PR professional and the founder of VOCAB Communications. She currently appears on The Discovery Channel and Max and hosts the Rebelliously Curious podcast, which can be found on YouTube and on all audio podcast streaming platforms. Follow her on X: @ChrissyNewton, Instagram: @BeingChrissyNewton, and chrissynewton.com. To contact Chrissy with a story, please email chrissy @ thedebrief.org.

By analyzing nickel isotopes preserved in the 66-million-year-old debris left by the Chicxulub impact, researchers conclude that the asteroid responsible for Earth’s last mass extinction most likely belonged to an exceptionally rare class of primitive meteorites called carbonaceous chondrites of the Ornans type (CO chondrites).

The post Dinosaurs May Have Been Wiped Out by ‘Oddball’ Space Rock appeared first on Sci.News: Breaking Science News.

Every year, more than 5,000 tons of material with cosmic origins lands on Earth’s surface, with as much as 15,000 tons of this “space dust” making its way into the atmosphere but vaporizing during reentry.

The resulting rain of micrometeorites that reaches our planet consists mostly of tiny objects anywhere from 30 to 200 micrometers in size, based on past studies. But what are the origins of these large volumes of material that accumulate over time as they shower the Earth throughout the year?

According to new research, evidence for one potential source of this cosmic debris has now been found: it could be coming from unidentified near-Earth objects.

Space Dust with Unknown Origins

The problem with tracing the origins of space dust is that most of it that makes its way into Earth’s atmosphere doesn’t survive the intense conditions of atmospheric entry, and those tiny bits that do—known as cosmic spherules—are reshaped as they melt from the friction they encounter while falling.

Although their original mineral structure is compromised as well as their shape, there are a few isotopes—namely oxygen—that these spherules maintain that scientists can use to help trace their origins. Based on their chemical “fingerprints,” cosmic spherules are placed into different groups by planetary scientists, with many being able to be traced back to known varieties of meteorites and other sources.

Among these groups, around ten percent fall into a category possessing unusually small quantities of the isotope oxygen-16. This category, known as Group 4, doesn’t appear to match any known meteorite group—the implication, therefore, is that some of this cosmic debris may originate from an unidentified variety of near-Earth objects.

New Clues to the Origins of Uncorrelated Space Dust

Now, according to new research by Matthias Van Ginneken and colleagues, there are at least some ways that the origins of these spherules can be determined, one of which involves their orbital parameters.

In one case, the team writes in a recent study published in Science Advances, “the mineralogical and textural properties of a subset of cosmic spherules do provide information on the orbital parameters of their precursors, including eccentricity and encounter velocity.”

This group of materials, which is dubbed “CumPo” based on its material consistency of cumulate olivine porphyritic, is “characterized by clustered olivine phenocrysts that increase in size from one side of the spherule to the other,” the team writes.

In short, this unique class of spherules points to equally unique orbital characteristics that may be associated with what the research team surmises could be atypical types of near-Earth objects, or NEOs, that could be near enough to our planet to provide a likely source.

A particular clue offered by these objects is that some of them may have undergone unusually high entry speeds, as evidenced by their surface texture. One factor that could potentially account for this is that they may have entered Earth’s atmosphere at angles consistent with objects possessing high orbital eccentricity.

More Clues from Antarctica

As with past studies, researchers were able to retrieve several samples of these CumPo cosmic spherules from Antarctica, which provides a pristine environment that helps to facilitate their discovery and collection. However, another source location had been far less remote: urban rooftops, where a large amount of cosmic dust lands every year.

With the aid of electron microscopy and microprobe chemistry studies, Ginneken and colleagues examined the mineralogy, chemistry, and textures of these spherules, as well as the oxygen isotopes they contained.

What they found indicated an entirely new subset of spherules, which possess significant amounts of cumulate olivine rich in sulfur, garnering the name “SCumPo.” This unique new class of samples has links to the “Group 4” class and their minimal inclusion of oxygen-16. Other unusual similarities they possess are an overall absence of magnetite and a low presence of nickel in their olivine crystals, paired with an abundance of iron-nickel sulfur and a significant amount of sulfur present within glasses produced from vitrification.

Intriguingly, some spherules appeared to show a combination of signatures that were both poor in oxygen-16 in some areas, while rich in the isotope in others. This suggests that these cosmic materials had likely been mixed from two separate original sources, since such conditions could not be otherwise explained through natural processes.

“We interpret this as strong evidence that the SCumPo precursors were composite materials containing at least two different components,” the team writes in their study. Then, by running numerical simulations of crystal settling to help determine the likely entry speeds of these materials, and thereby their eccentricities while in orbit, the team determined that the settling of olivine is most consistent with entry speeds of as much as 17 kilometers per second, and likely no more than 14 kilometers per second—speeds that would be consistent with NEOs, as opposed to asteroids originating from the main-belt.

Evidence for an Unknown Class of Space Objects

Based on their findings, the team believes that unsampled meteorites from the CM, CO, and CY classifications of carbonaceous chondrites—a group of primitive, carbon-rich meteorites containing some of the oldest materials in our Solar System—are the likely sources for these cosmic materials.

“Given that we have linked their composition to the CM-CO-CY clan of carbonaceous chondrites, it is plausible that their parent body was a primitive carbonaceous asteroid that migrated onto an Earth-crossing orbit—attaining comet-like orbital parameters,” the team writes.

“For instance, one might consider the disrupted fragments of a thermally altered but water-bearing asteroid (like the CY group) that evolved into near-Earth space,” they add.

Although still only inferred from their studies, the team suggests the existence of a hypothetical new variety of NEOs based on the samples they studied, which are unlike any variety of meteorites currently known on Earth.

“These findings point to a previously unsampled, primitive, sulfide-rich CY-like near-Earth asteroid, which represents a ‘missing’ meteorite parent body that contributes distinctive ¹⁶O-poor cosmic dust to Earth,” the team writes, noting that any future confirmation of the existence of this unknown class of meteorites would represent “a pivotal discovery.”

The team’s new paper, “¹⁶O poor cosmic spherules from near-Earth CY chondrite asteroids,” appeared in Science Advances.

Micah Hanks is the Editor-in-Chief and Co-Founder of The Debrief. A longtime reporter on science, defense, and technology with a focus on space and astronomy, he can be reached at micah@thedebrief.org. Follow him on X @MicahHanks, and at micahhanks.com.