The exploration of space took a leap forward this week with the successful launch of Nasa's Artemis II. Its mission will see four astronauts travel more than half a million miles around the moon , with the aim of a better understanding of the lunar environment. It's also expected to result in a moon landing, and ultimately pave the way for a moon 'base '. It's been more than 50 years since humans last landed on the moon with astronauts Eugene Carnan and Harrison Schmitt spending over three days