How to watch ‘historic’ NASA-SpaceX Demo-2 mission live from home

SpaceX's Falcon 9 readies for space mission

Stormy weather slows SpaceX's first astronaut launch

NASA, in collaboration with SpaceX, dubbed "Launch America", has given the final "go" and the launch is scheduled for 04:33 PM EDT (2:03 AM IST) on Wednesday.

- Who are Robert Behnken and Douglas Hurley?

Assuming that the weather cooperates, the next big uncertainty has to do with how long SpaceX's first spacefliers will stay at the station.

More than two years behind schedule, SpaceX is nevertheless delivering the Crew Dragon spacecraft and launch system for roughly $2.6bn, while Boeing has taken in some $4.2bn for its troubled Starliner effort. And seeing as Russian Federation is not now exactly Uncle Sam's best buddy and president Trump has recognised the strategic significance of space by creating a new branch of the armed forces dedicated to it, sovereign crewed launch capacity is viewed as a very good thing to have.

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Instead Mr Johnson referred reporters to Mr Cummings and said these were questions for him to answer. He said: "Wash your hand, keep social distance, and isolate if you have symptoms and get a test".

As part of what is being called the Demo-2 mission, the Crew Dragon spacecraft will carry NASA astronauts Bob Behnken and Doug Hurley up to the International Space Station (ISS). This will mark the first time astronauts liftoff from Florida in nine years, and the first time they'll do so for a commercial company.

- What will they do when they are in the space station? A crucial decision point will come at T-minus-45 minutes, when the go-ahead is due to be given for arming the Dragon's launch escape system and fueling up the Falcon 9 rocket with highly refined kerosene and liquid oxygen. But for most of the flight, including the station docking, the Dragon will be under autonomous control.

The Crew Dragon pod for this test run is created to last in orbit for 110 days, but Behnken and Hurley will return to Earth when another commercial crew is able to travel to the ISS. The mission's duration is to be determined after its arrival; once complete, SpaceX's Crew Dragon will undock from the station, de-orbit, and return Hurley and Behnken to Earth. Once fully operational, the Crew Dragon spacecraft would be able to last 210 days in orbit.

"We had a really good successful launch Readiness Review and we go for launch", Hans Koenigsmann vice president of Build and Flight Reliability at SpaceX, said in a briefing after the launch readiness review.

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Issuing an apology via NBC she said: "I sincerely and humbly apologise to everyone, especially to that man, his family". Cooper to police for no reason at all, possibly escalating the situation and putting an innocent man in harm's way.

SpaceX's recovery ship, called Go Navigator, will be waiting nearby to retrieve the duo and ferry them to Cape Canaveral.

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. NASA says that space starts at an altitude of 80kms from the Earth.

Boeing also has a similar deal with the space agency, worth 4.2 billion United States dollars (£3.4 billion), to send astronauts to the space station in its CST-100 Starliner crew capsule, although its vehicle is not expected to be ready until next year.

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La décision de l'OMS s'appuie sur une étude publiée dans la prestigieuse revue médicale The Lancet vendredi 22 mai 2020. Le professeur Raoult a réagi à la polémique et défendu sa position.

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