Countdown underway for first manned Moon mission in more than 50 years as crew 'ready to go'
Nasa's Artemis II marks the first manned moon mission in 53 years
Space
Chinese probe discovers mysterious huge 'cavity' lurking between Earth and the Moon
The discovery could prove vital for keeping astronauts safe in future lunar missions
Comet disintegration allows astronomers to see more detail than ever before
Researchers at Auburn University in Alabama had originally intended to study an entirely different celestial object
