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A study by researchers Cole Gregg and Paul Wiegert from the University of Western Ontario indicates that particles from the Alpha Centauri star system could be entering Earth's atmosphere. The findings suggest that, while a small number of particles may currently arrive each year, this could increase as Alpha Centauri approaches the Solar System at a speed of 79,000 kilometers per hour (about 49,000 miles per hour). The star system, identified as the closest to our Solar System, is expected to be at its closest point in approximately 27,700 years.
Gregg and Wiegert's study, soon to be published in the Planetary Science Journal, proposes that up to a million objects could be hiding within the Solar System's Oort Cloud. These objects are difficult to detect due to their distance, but ongoing missions like NASA's New Horizons may help identify them. The researchers emphasize the importance of understanding interstellar material transport for deeper insights into the connections between stellar systems. Ultimately, the study enhances our awareness of the potential for material exchange within the galaxy.