Interest in returning astronauts to the Moon has changed considerably over the past few years. What was once centred on individual landings is gradually becoming a much broader effort to establish a lasting human presence beyond Earth.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Created in Canva Pro. The second full moon of May, the 'Blue Moon', rises ...