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Exactly two years ago tomorrow, an unexpected visitor surprised a homeowner in Hillsborough, New Jersey. When a loud crash interrupted his morning on July 16, 2024, the man ran to the fountain in his bedroom. Inside, he discovered a chaotic scene and a large hole in the ceiling.
“I smelled a strong sulfur odor and saw many black fragments along with debris and black dust covering my bed, carpet and surrounding areas,” the man recalled.
Thinking quickly, he documented the surreal situation and stored the rock fragments in glass jars using aluminum foil and disposable gloves. The media and corroborating witnesses soon confirmed the culprit: a daytime meteorite, the size of a suitcase, had entered Earth’s atmosphere at a speed of 32,000 miles per second. Cameras in Connecticut, Pennsylvania and New Jersey recorded the event as it rose over the Northeast, while at least 16 people reported experiencing a shock wave as the space rock rapidly disintegrated about 22 miles above Earth. Doppler weather readings even pointed to a long trail of pebble-like fragments as they rained over Staten Island and parts of New Jersey. And according to the data, the largest fragments would have fallen around Hillsborough.
After months of careful analysis, astronomers from the SETI Institute, NASA and the American Meteor Society published their findings on the interstellar specimens in the journal Scientific advances. The meteorite is not only extremely rare, but it contains traces of the same vital chemicals that helped form organic life on Earth.
“A forensic study of the fragments revealed that they contained fragments preserved near the surface of an early asteroid where it experienced concentrated salty fluids, a process not previously known on this type of protoplanetary world,” Peter Jenniskens, study co-author and SETI and NASA astronomer, explained in a statement.
Initially, researchers determined that the Hillsborough remains belong to one of two types of primitive meteorites known as CM-type carbonaceous chondrites. After observing that the fragments had been altered more significantly by ancient water while still part of their parent asteroid, the team realized that the pieces technically It cannot be classified as CM1 or CM2. Instead, they belonged to an intermediate type of meteorite with an understandable name: a CM1/2 carbonaceous chondrite. While the New Jersey incident was the 22nd CM-type meteorite atmospheric entry observed, it was only the second CM1/2 event ever witnessed on Earth.
“Thanks to the owner’s quick reaction, these are the most pristine CM1/2 meteorites we know of,” Jenniskens added.
The Hillsborough meteorite also contained tiny salt-laden fragments that point to its original location on its parent asteroid. Before breaking apart, the space rock likely formed near the asteroid’s surface, where liquid water evaporated and subsequently concentrated various salts. Similar levels of salt in brackish fluids can preserve the chemical compound phosphate in a solution, which can then initiate chemical reactions between minerals and organic materials. Basically, the salts inside the Hillsborough meteorite closely resemble those needed for life to first develop on Earth.
“Carbon and nitrogen isotopic studies suggest that early carbonaceous chondrites, including those of the CM type, transported organic matter to the early Earth,” said study co-authors Queenie Chan and Nana Ogawa. Chan is a cosmochemist at Royal Holloway University of London, while Ogawa is a biogeochemist at the Japan Agency for Marine and Earth Science and Technology.
Phil Schmitt-Kopplin, a specialist in organic mass spectrometry at the Technical University of Munich, added: “A large part of the compounds were products of organic chemistry with minerals.”
Schmitt-Kopplin cautioned that researchers are still unsure whether the meteorite’s compounds formed through brine chemistry or earlier impact processes. Regardless of how they formed, meteorite components are classified on Earth as organometallic compounds that are vital to life. They exist in the blood of animals and help plants produce food through photosynthesis. If all that wasn’t enough, the Hillsborough meteorite also contained a variety of amino acids critical to life.
Despite the property damage, the New Jersey meteorite fragments are a rare reminder that asteroids are not always inert, desolate rocks. Many contain complicated chemistry and organic matter, and it’s those features that likely fueled life on Earth billions of years ago.
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