What happens to a moon when its planet is stolen?

Yannick Badoux and Simon Portegies Zwart simulated 34,000 stellar encounters to see if moons survive when planets get thrown out of systems. They found that moons close to their planets stay attached during ejection. These findings show that a moon’s orbit carries clear fingerprints of how its planet was stolen.

A 21-hour dip could help explain Tabby's star's decade-long dimming mystery

Researchers studied Tabby’s star to explain its decade-long dimming mystery. A new study published on July 6 showed a 21-hour dip in the star’s light on Sept. 3, 2019. This signal, found using NASA’s TESS data, suggests a giant planet or brown dwarf might be blocking the star’s light.