Hillsborough Meteorite Crash in New Jersey
On July 16, 2024, a space rock weighing roughly 110 pounds (50 kilograms)—the size of a heavy airline bag—streaked across the sky, causing a sonic boom that shook New York City before crash-landing through the roof and bedroom ceiling of a house in Hillsborough, New Jersey. The event, which occurred in the middle of the afternoon, resulted in the recovery of the “Hillsborough meteorite,” now identified by researchers as one of the most scientifically valuable meteorites ever recovered.
Peter Jenniskens and the Preservation of Samples
The scientific success of the study, published Wednesday in the journal Science Advances, was predicated on the immediate and careful recovery of the fragments by the homeowner. Recognizing the potential value of the find, the homeowner protected the samples by wearing disposable gloves and storing the fragments in aluminum foil and glass containers. According to lead author Peter Jenniskens, a meteor astronomer at both NASA’s Ames Research Center and the SETI Institute, this was a stroke of absolute luck.
Jenniskens noted that carbonaceous chondrites “suck in every moisture you can think [of].” Had the homeowner handled the rocks with bare hands, oils and moisture from his skin could have contaminated the samples. While some fragments contained remnants of fiberglass and carpet from the roof, the integrity of the meteorite remained remarkably well-preserved. The homeowner also contacted the American Meteor Society quickly, ensuring the samples remained pristine for investigation by an international team of experts.
Mike Zolensky’s Laboratory Classification of the CM1/2 Chondrite
Laboratory analysis, led by co-author Mike Zolensky, a meteoriticist at NASA’s Johnson Space Center, revealed the rock to be a rare, primitive material called a CM1/2 carbonaceous chondrite. This classification marks it as only the second observed fall of such a meteorite. By combining data from cameras that tracked the fireball’s trajectory with laboratory analysis, scientists were able to determine where in the asteroid belt the rock originated. These primitive rocks record chemical processes that shaped the solar system more than 4.5 billion years ago.
Queenie Chan Identifies Alien World Chemistry
The forensic study revealed that before the meteorite broke off from its parent asteroid, it had been covered in “concentrated salty fluids,” or a brine. This feature had never been seen before on this type of object. Researchers found microscopic fractures filled with sodium-rich material left behind by these ancient brines. “In a way, you can think of it as smelling the origins of life’s atmosphere,” Jenniskens said. The high concentration of salt in these brines allows phosphate to remain suspended in a solution, potentially sparking chemical reactions between materials.
Inside the meteorite, researchers discovered a rich inventory of organic compounds, including amino acids and magnesium organic compounds—the latter of which are found in blood and used in photosynthesis. Cosmochemist Queenie Chan suggested that asteroids made of carbonaceous chondrite may have delivered organic matter to the early Earth. The presence of this “alien world chemistry” suggests these meteorites may have brought the materials that resulted in organic life. Following the study, fragments of the Hillsborough meteorite will enter the care of the American Museum of Natural History, where curator Denton Ebel stated, “We are thrilled that nature delivered such a precious asteroid sample on our doorstep.”
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