Voyager, Pathfinder, Cassini. Humanity has sent out dozens of plucky little space probes to explore our solar system. But when these robots need to call home, who’s listening in?
Written by Sarah Kellett Our Sun has a neighbour, and it’s as cold as the North Pole. An invisible brown dwarf has been found a mere 7.2 light years away, by space telescopes searching in the infrared.
