How big are the asteroids scientists actually worry about? Could one really hit us? And where do asteroids even come from? Made in partnership with The Royal Society. #BBCIdeas #Asteroid #Science #Universe #Space | BBC One

Earth's new quasi-moon, named 2025 PN7, is a small near-Earth asteroid that moves around the Sun almost in step with our planet, taking roughly the same amount of time to complete one orbit - about a year. This synchronized path makes it appear to loop around Earth from our perspective, giving it the nickname "quasi-moon." However, it isn't a true moon because it isn't gravitationally bound to Earth; it simply shares a similar orbit. The object is about 19 meters wide - tiny compared to our Moon