The riddle of the hypergiants

New model suggests Hawking radiation is speeding cosmic decay Scientists have long predicted that the Universe’s lifetime is effectively forever – specifically, 101100 years. But now scientists from R

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

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

Neutron stars can suffer quakes far more powerful than anything on Earth

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

Seeking answers to your science questions? Ask our resident expert, Peter Gallivan