Sometimes, things line up just perfectly. For example, back in 2017, the Hubble Space Telescope got a full view of Saturn’s northern aurora. The newly-released image above isn’t exactly what Hubble saw — but it’s still exciting, I promise.
Twenty-two years ago, the Galileo spacecraft made its first flyby of Ganymede, Jupiter’s largest moon. Scientists with NASA have taken a new look at the data collected during that historic encounter, providing tantalising new details about this strange celestial object, its unique magnetic shield, and its unusually bright auroras.
Video: This beautiful 4K video shows in gorgeous detail how the sun’s powerful plasma eruptions ultimately create auroras, when solar particles beat the earth’s magnetic field and hit its upper atmosphere. The journey is amazing in itself, but then so are the results.