A Physicist Wants to Turn Jupiter’s Largest Moon Into a Gigantic Dark Matter Detector
When searching for the unknown, classic physics wisdom holds that a bigger detector boosts the chances of discovery. A physicist is taking that advice to heart, advancing a bold plan to use none other than Ganymede—Jupiter’s largest moon—as a dark matter detector on an astronomical scale. Dark matter refers to the “invisible” mass that supposedly constitutes 85% of the universe. There’s considerable evidence that dark matter exists, but it’s “dark,” meaning it doesn’t respond to light and very