- What is the objective of this mission?
Furthermore, Douglas Hurley piloted Atlanta's trip.
She said: "We're burning down the final paper".
The weather was bright and sunny for Saturday's dress rehearsal, during which Hurley and Behnken (pictured, left to right) suited up and climbed aboard the Crew Dragon.
But the Unity is a suborbital vehicle; SpaceX wins the prize for the first orbit-capable craft - and it's actually delivering crew.
The Crew Dragon capsule atop a Falcon 9 rocket, delivering two astronauts to the International Space Station, will be the first American manned launch to orbit in almost a decade: NASA had stepped aside from that task as part of encouraging the private sector to jump in.
Shortly after lift-off, the rocket will separate into what is called a first stage and a second stage.
Ahead of this much-anticipated launch, SpaceX tested an uncrewed version of Crew Dragon on 19 January. The astronauts arrived for the May 27th scheduled inaugural flight of SpaceX's Crew Dragon spacecraft.
- What will they do when they are in the space station?
Aside from Crew Dragon Demo-2, SpaceX operates a Starlink satellite factory near Seattle, builds and assembles all aspects of Falcon rockets and Dragon spacecraft at its Hawthorne, CA headquarters, tests those rockets and spacecraft in McGregor, Texas development facilities, and builds, tests, and flies Starship prototypes in Boca Chica, Texas.
The spacecraft is created to do this autonomously, but astronauts aboard the spacecraft and the station will be monitoring approach and docking, and can take control of the spacecraft if necessary, according to NASA.
But the pair's main mission is to conclude the validation process that is required by Nasa to ensure the spacecraft created to carry astronauts can operate safely.
Astronauts Behnken and Hurley are due to spend one to four months on board the orbiting ISS.
SpaceX told to watch the Falcon 9 rocket towards the International Space Station via a live stream. Once fully operational, the Crew Dragon spacecraft would be able to last 210 days in orbit.
By Wednesday, the tropical wave is predicted to be positioned near the Carolinas, but its counterclockwise circulation could draw moisture back over the Florida Peninsula, allowing scattered thunderstorms to flare up and move toward the vicinity of the Space Coast around the 4:33 p.m. launch time.
-45:00 - SpaceX launch director verifies go for fuel propellant.
What was unforeseen at the time was that in six years NASA would cease using the Space Shuttle.
Elon Musk's Space Exploration Technologies Corp (SpaceX) is set to be the first privately owned rocket to carry astronauts into Earth orbit when it launches on Wednesday night.
If Demo-2 is successful, SpaceX will be allowed to go ahead with more manned missions to the space stations as part of their 2.6 billion USA dollar (£2.1 billion) contract with Nasa.
"To reinstate what we call dissimilar redundancy - a different way of getting to and from the space station - would be very significant for the future of the space station".