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.
You might see science as splashy headlines and a barrage of new results – but in the background are people with emotions and ambitions, politics, and a system that promotes publishing novel findings above all. A new paper on eel navigation highlights some of these systemic troubles.
A rather massive coronal hole was recently spotted on the Sun by NASA’s Solar Dynamics Observatory. The region — the size of 50 Earths — is spewing material into space at tremendous speeds. It may look terrifying, but astronomers say it’s nothing to worry about.