A hidden moon may hold together the rings of a comet-like object between jupiter and neptune

Ten years ago, Pluto emerged from the gloom at the Solar System’s ragged edge – and a new world came in from the cold. Five billion kilometres (3 billion miles) from Earth, on 14 July 2015, NASA’s pia

Type: Sinuous rille Size: 80km x 2.5km Longitude/latitude: 3.1° E, 25.7° N Age: 3.2–3.9 billion years Best time to see: First quarter (2–3 July) and six days after full Moon (16–17 July) Minimum equip

On 23 July 1999, Space Shuttle Columbia launched its heaviest-ever payload: the Chandra X-ray Observatory, a new flagship telescope for NASA. It is the world’s most powerful X-ray telescope, capable o

You’re woken in the middle of the night by an urgent phone call. An asteroid is headed straight for Earth and it’s your job to find out if it’ll strike the planet and rain destruction down upon us all

The best discoveries, inventions and surprises

Scientists distinguish between weight and mass, which may seem pedantic until you see what happens on a world where gravity is radically different to Earth’s