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A new study has revealed that more than one million interstellar objects, each larger than 100 meters, are drifting undetected beyond our solar system. According to simulations published on arXiv, these macroscopic objects are believed to be moving towards Earth from the Alpha Centauri star system, which is approaching our solar system at a rapid pace.
The researchers behind the study utilized simulations to estimate the amount of interstellar material ejected into our vicinity. While it is unlikely that these cosmic giants will come close to Earth, their presence supports the notion that our solar system is not isolated but rather interacts with its neighboring star systems. In about 28,000 years, Alpha Centauri will reach its closest point to the Sun, potentially leading to an increased influx of interstellar objects.
One notable past visitor from interstellar space was 'Oumuamua', discovered in 2017, prompting ongoing investigations into such phenomena. Meanwhile, scientists also maintain vigilance over asteroid 2024 YR4, whose odds of collision with Earth have risen, currently estimated at 2.3%, although further observations may reassess this risk.