This visually stunning guide gives an up-close look at some of the more elusive objects in space. Definitions of better-known objects, such as comets, as well a

'A promising debut.' New Scientist Icy, rocky, sometimes dusty, always mysterious – comets and asteroids are among the Solar System's very oldest inhabitants,

Comets and asteroids are in some sense the fossils of the solar system. They have avoided most of the drastic physical processing that shaped the planets and th

From earliest times, humans have wondered about the sky above them and have studied all visible objects. People began to identify differences between stars and

Oumuamua is a space rock that formed around another star. Of the 10,000 space objects that have hurled past our Sun, this rock provides some proof that there ar