Four astronauts blasted off on Wednesday for a trip around the moon, marking humankind’s deepest venture into space in an odyssey that aims to launch the US into a new era of interstellar exploration.Carrying three Americans and one Canadian, a 32-story rocket rose from Nasa’s Kennedy Space Centre, where tens of thousands gathered to witness the dawn of this new era.Crowds also jammed the surrounding roads and beaches, reminiscent of the Apollo moonshots in the 1960s and ’70s. It is Nasa’s...