Journey From the Far Side of the Sun

Studying the Sun from Earth can be frustrating. From 150 million kilometers away, we can only see one side at a time. Sure, the Sun rotates, so we see the whole thing over the course of about a month, but sometimes you want to see it from different angles at the same time, like when it shoots out an explosive flare or coronal mass ejection. What you want is a stereo view. Or STEREO. STEREO is the Solar TErrestrial RElations Observatory, a pair of Sun-orbiting satellites; one is in a slightly sma...