Asteroid orbiting the wrong way outed as an 'alien'
An asteroid lurking near the orbit of Jupiter is the first known immigrant from beyond our solar system to take up permanent residence in our corner of the cosmos. Scientists say the interstellar expat could help us understand how life started on Earth and perhaps in other places too.
Astronomers say the space rock known as 2015 BZ509 is the first to come for a visit and wind up staying.
This asteroid is different from the interstellar visitor 'Oumuamua that made headlines last year when scientists spotted it as it swung through our solar system, apparently for the first time ever, and kept right on cruising by.
