It's no secret that auroras are a common presence on other planets... however, you might be surprised by the ones you can't usually see. A new study using NASA's Chandra X-ray Observatory has caught solar storms creating X-ray auroras on Jupiter as they interacted with the gas giant's magnetosphere (that is, the space controlled by its magnetic field). They make Earth's northern lights seem downright quaint by comparison -- they cover areas larger than our entire home planet, and they're "hundreds of times" more energetic than what you see in the night sky.