The countdown clock is officially rolling at Kennedy Space Center in Florida, where four astronauts are preparing to take off on the mission of a lifetime — circumnavigating the moon and returning hum...

The crew on board Nasa's Artemis II spacecraft have described seeing the far side of the Moon for the first time.

The first image, called Hello, World, shows the vast expanse of blue that is the Atlantic Ocean, framed by a thin glow of the atmosphere as the Earth eclipses the Sun and green auroras at either pole.