Astronauts Robert Behnken and Douglas Hurley boarded a Crew Dragon capsule built by Elon Musk’s California-based company SpaceX, but the mission was called off 17 minutes before the launch time.
“We can see some raindrops on the windows and figured that whatever it was was too close to the launchpad at a time when we needed it not to be,” said Mr Hurley after the announcement.
The next opportunity for SpaceX and Nasa will come on Saturday. SpaceX and Nasa were set to launch the Crew Dragon spacecraft at 9:33pm UK time.
There is great interest in this mission. Not since the retirement of the shuttles in 2011 has America been able to launch its own astronauts into space.