Astronomers have detected two stars that are on course to collide and create a spectacular explosion in Earth's sky sometime between 2021 and 2023. This binary star system is known as KIC 9832227 and consists of two stars that orbit each other once every 11 hours or so. Astronomers predict that the binary star will merge and
create a bright explosion visible in the constellation Cygnus. "It's a one-in-a-million chance that you can predict an explosion" of a star, Larry Molnar, an astronomy professor at Calvin College who predicted the timing of the binary collision, said in a statement from the college. "It's never been done before."