New simulations suggest that up to 1 million “interstellar objects” – each larger than the Statue of Liberty – may be hiding in the outer solar system. These cosmic interlopers, originating from our closest stellar neighbors Alpha Centauri, have traveled here over 100 million years and are unlikely to come near Earth.
Unlike previously detected objects ‘Oumuamua and Comet Borisov, these new objects are permanently trapped by the sun’s gravity and reside in the Oort Cloud. This vast reservoir of comets and asteroids is nearly impossible to spot.
The Alpha Centauri system, consisting of three stars – including a confirmed planet Proxima Centauri b – is moving towards us. As it approaches, the number of objects entering our solar system will increase exponentially.
Research suggests that comparable levels of interstellar material are being captured by both Alpha Centauri and our own solar system. This transfer of materials opens up new pathways for exploring the interconnectedness of stellar systems and potential material exchange across the galaxy.
About 10 particles larger than 100 micrometers enter Earth’s atmosphere every year, burning as meteors. However, smaller interstellar particles are likely hitting our planet more frequently.
A better understanding of this phenomenon will help scientists uncover more secrets about our cosmic neighborhood and the mysteries surrounding our solar system.
Source: https://www.livescience.com/space/astronomy/1-million-interstellar-objects-each-larger-than-the-statue-of-liberty-may-lurk-in-the-outer-solar-system