About 70,000 years ago, a binary stellar system called ‘Scholz’s star’ passed within only 52,000 astronomical units (AU) of the Sun, i.e., within the icy Oort Cloud, a region at the edge of our Solar System filled with trillions of comets a mile or more across. The movement of some of these objects is ‘still marked by that stellar encounter,’ according to a new study published in the Monthly Notices of the Royal Astronomical Society Letters. Scholz’s...