Three Main Belt Comets

Mysterious comets put under scrutiny

Astronomers are investigating the properties of mysterious members of the Solar System called Main Belt Comets by trying to determine the source of their dust tails.

Artist's impression of Europa's underground lake

Ice moon’s lakes could hold alien life

The ice crust of Jupiter’s moon Europa hides a lake as large in volume as the American Great Lakes, say scientists studying images from NASA’s Galileo spacecraft.