I’m an ex-NASA scientist – these are the planets where alien life really could exist

NASA paid me $1bn to stop an asteroid crashing into Earth… this is the heart-stopping truth about my ‘Armageddon’ moment, when it could all have ended in disaster

From a Total Solar Eclipse to 11 meteor showers: The stunning astronomical events set to grace our skies in 2024 – and how to see them

Mysterious metal spheres discovered at the bottom of the ocean are simply industrial pollutants – and NOT alien-made, study claims

What’s the longest amount of time someone has been in space? How Frank Rubio’s 371-day stint pales in comparison to the record-holder, who spent 437 continuous days in orbit

Scientists sound alarm as NASA says small chance asteroid ‘Bennu’ the size of the Empire State Building could smash into earth: ‘It would be like unleashing 24 atomic bombs’

Stunning winning photos from the Royal Observatory Greenwich’s Astronomy Photographer of the Year are revealed – from a question mark on the sun to a running chicken nebula

NASA’s ‘asteroid autumn’: MailOnline delves into a trio of exciting missions – from visiting a ‘$10,000 QUADRILLION space rock’ to retrieving a sample from a 4.5 billion-year-old rock that could reveal how life on Earth began

NASA publishes findings of a long-awaited study on UFOs today

Rival scientists spark row over ‘interstellar meteorite’ that Harvard physicist announced to world after recovering it from bottom of the Pacific Ocean – and say they’re ‘very sceptical’ that the object came from outside solar system