by Peter Tyson Written in the Star The future of our solar system largely hangs on how the Sun ages. Regardless of the outcome, it doesn't look good for Earth. Illustration by Casey Reed 22 O C T O B E R 2 0 17 * S K Y & T E L E S C O P E CREDIT.LEF T X X X X X X X X X X X X X X X FATE OF THE SOLAR SYSTEM