Space rock that hit New Jersey home reveals essential components for life
Fragments of a meteorite that passed through the roof of a residence in New Jersey, United States, on July 17, 2024, had a chemical composition that dates back to the beginning of the solar system. The detailed analysis revealed molecules considered crucial for the formation of life, such as amino acids and carbon.
The surprising impact on Hillsborough
Residents of several states, such as New York, New Jersey, Connecticut, Rhode Island and Pennsylvania, reported seeing a fireball during the day and hearing a sonic boom on that July 17, 2024. The phenomenon was caused by a space rock weighing approximately one kilogram, which traveled through the Earth’s atmosphere at an estimated speed of 51,500 kilometers per hour.
Unlike other meteorites, this rock was quite fragile and broke about 35 kilometers above the ground. Weather radar at Newark Liberty International Airport detected a cloud of fragments, but only one was recovered after piercing the ceiling of a master bedroom in Hillsborough, New Jersey. Fortunately, the impact did not cause any injuries to residents.
Discovery of extraterrestrial amino acids and carbon
Scientists published a thorough analysis of the fragment, identifying extraterrestrial amino acids and carbon, often considered the building blocks of life. Study co-author Dr. Danny Glavin, a senior scientist at NASA, said the meteorite contains hundreds of amino acids, most of which are uncommon on Earth.
More on this story: Discovery in New Jersey meteorite reveals molecules crucial to the origin of life
He said the diversity of amino acids in the Hillsborough meteorite surpassed that found in pristine samples from carbon-rich asteroids such as Bennu and Ryugu. Glavin added that many of the detected amino acids are rare or non-existent in terrestrial life, confirming their truly extraterrestrial origin.
The unique classification of the CM½ meteorite
Detailed analysis classified the Hillsborough meteorite as a CM-type carbonaceous chondrite. The letter “C” indicates their carbonaceous nature, while “M” refers to the Mighei meteorite, a carbonaceous chondrite that fell in Ukraine in 1889. These space rocks are remnants of rocky bodies that circulated in the early solar system, containing hydrated minerals and organic compounds.
Primitive carbonaceous chondrites are believed to have been the type of space rock that collided with early Earth, contributing to the delivery of organic matter. The Hillsborough meteorite, according to Glavin, provides further evidence that the arrival of organic matter by meteorites may have been an important source of molecules necessary for the origin of life on the planet.
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Understanding the formation of life on Earth
The research classified the Hillsborough meteorite as CM½, an intermediate category between types CM1 and CM2, which are distinguished by the degree of alteration by water in their composition while they were still in larger asteroids. The study’s lead author, Peter Jenniskens, noted that this is only the second time a CM½ meteorite has been witnessed falling to Earth and the first to be studied in such a pure sample.
Jenniskens said the rock contains fragments that preserve the original asteroid’s subsurface, offering a unique window into its physical properties. Scientists detected high concentrations of sodium, likely coming from icy brines within the initial asteroid. The evaporation of water in the space rock may have left behind concentrated salt minerals capable of creating vital molecules.
Learn more: Asteroid Bennu: NASA finds life components that question hot water theory
Peter Brown, a professor of physics and astronomy at Western University in London, Ontario, who was not involved in the study, described the brine discovery as a “remnant of percolated water or ice.” He said everything that can be learned about how water modifies early meteorites is of paramount importance for astrobiology and for understanding early biology on Earth. According to Brown, these meteorites contain the chemistry of the primordial solar system because they have not been subjected to great heating, preserving the interaction of water with minerals and organic matter.
The importance of rapid preservation by residents
The agility of the Hillsborough homeowners was critical in detecting the brine and other valuable compounds. The couple quickly contacted Mike Hankey, study co-author and member of the American Meteor Society, who advised them on how to preserve the sample and minimize contamination.
The owners, who preferred to remain anonymous, said: “We knew almost immediately that what happened to us was incredibly rare and we felt a responsibility to preserve the meteorite for the scientific community.” They described the experience as surreal, thinking the meteorite traveled through space for millions of years before ending its journey at their home. The fragments of the Hillsborough meteorite are in custody at the American Museum of Natural History in New York.
