The mysterious cloud of space rocks and debris at the edge of the solar system may have spiral arms, making it resemble a minigalaxy, a new study says.
The Oort cloud is a theoretical debris shell at the gravitational edge of the solar system whose origin could shed more light on the source of comets as well as the origin of our neighbouring planets.
The giant cloud of detritus is thought to be the source of strange comets and meteorites flying past Earth such as the mysterious cigar-shaped rock known as Oumuamua that was spotted in October 2017………