Carl Sagan detected life on Earth 30 years ago – here’s how his experiment is helping us search for alien species today
Earth and Moon as seen by the Galileo spacecraft from a distance of 6 million km away. NASA…
Winter solstice: the astronomy of Christmas
Stonehenge sun. Gareth Dorrian, Nottingham Trent University and Ian Whittaker, Nottingham Trent University From the Neolithic to present…
Zombie worlds: five spooky planets orbiting dead stars
PIA. NASA/JPL Gareth Dorrian, University of Birmingham All stars, including the Sun, have a finite lifetime. Stars shine…