Some meteors may have travelled a very long way William Attard McCarthy / Alamy Stock Photo
鈥極umuamua the 鈥渋nterstellar asteroid鈥 may not have been the first interstellar rock we鈥檝e ever seen. A meteor that burned up in Earth鈥檚 atmosphere in 2014 may have come from a distant planetary system – and if it did, it was probably from the area around the system’s star where life would be most likely to develop.
Every day, more than 100 tonnes of space dust and rocks hit Earth鈥檚 atmosphere, where most of it burns up before it hits the surface. 鈥淓arth…
