Mercury is no easy target - its proximity to the Sun makes it harder to reach than Jupiter. But in 2023, BepiColombo soared in for a second flyby, capturing ghostly terrain and unexpected anomalies in ...

A group of comets with unexplained movements presents a quandary D avide Farnocchia hunts down and tracks asteroids, and several years ago he saw something he couldn’t explain. Farnocchia works at ...