The US Space Force has confirmed that a meteor that struck Earth near Papua New Guinea in 2014 was not from this Solar System, making it not only our earliest-known interstellar visitor, rather than 2017’s ‘Oumuamua—but also the first known object of its kind to have crashed into the Earth. Thisread more

Astronomers have released their first analysis of our second known interstellar visitor, comet 2I/Borisov, and these findings show that despite the comet’s extra-solar origins, the materials that this alien visitor is made of are downright familiar. First spotted on August 30, 2I/Borisov’s orbital path was quickly determined to follow aread more