In billions of years’ time, once our sun has used up all its fuel and puffed up to become a red giant before throwing off layers to form a planetary nebula, all that will remain at its heart is a ...
Every year, around 1,000 Type Ia supernovas erupt in the sky. These stellar explosions brighten and then fade away in a pattern so repeatable that they’re used as “standard candles”—objects so uniformly bright that astronomers can deduce the distance to ...
