Half a century after humans first touched down on the moon, we are once again planning missions there. Cheaper rockets, more powerful computers, and economic competition with technology at its heart is spurring a growth in space flight. Today, digital foreign editor Chris Zappone speaks to Professor Alan Duffy, an astronomer at Swinburne University and Director of Space Technology and Industry Institute, about the race to get back to the moon and possibly beyond.Subscribe to The Age & SMH: https://subscribe.smh.com.au/See omnystudio.com/listener for privacy information.