The weather is the subject of many a conversation here on earth. But did you know that weather also occurs in space, even though it's a thousand times emptier than the best laboratory vacuums here on Earth. Much like terrestrial weather, spaceweather results from a complex system driven both by the Sun and events much closer to Earth. From solar storms and winds to giant explosions and cosmic rays, space weather can have a huge impact on human operations, including interfering with satellite electronics, communications and even GPS signals. RAZOR takes a look at the increasingly important field of spaceweather forecasting.