Andrew Zic

Astronomers discovered an unusual radio signal with a 36-minute period. It sent pulses for only eight days, then vanished. Its radio waves oscillated strictly in one plane, and that plane gracefully rotated. Such 'beacons' likely flare up frequently in the Galaxy, but are hard to catch. Unraveling t

Astronomers used pulsars — ultra-precise cosmic lighthouses — to search for elusive dark matter. If it were made of ultralight wave-particles, they would distort the flawless rhythm of these stars. Years of observations showed no disturbances, but for the first time set bounds for two hypothetical f