First Nasa crew comprised equally of men and women heads to ISS on SpaceX flight

SpaceX Crew-4 astronauts, from left, pilot Bob Hines, mission specialist Jessica Watkins, commander Kjell Lindgren, and European Space Agency astronaut Samantha Cristoforetti (John Raoux/AP)

SpaceX has launched four astronauts to the International Space Station for Nasa, less than two days after completing a flight chartered by millionaires.

It is the first Nasa crew comprised equally of men and women, including the first black woman making a long-term spaceflight, Jessica Watkins.