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Here is the blow-by-blow timeline of the successful SpaceX-NASA launch

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Watch SpaceX launch NASA astronauts into space in a historic mission

CAPE CANAVERAL, Fla. — SpaceX successfully completed its second attempt on Saturday to launch NASA astronauts after severe weather postponed the mission on Wednesday. You can read a full overview of the mission here.

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3:35 pm: The astronauts reach orbit

SpaceX's Crew Dragon spacecraft separated from the Falcon 9 rocket and officially reached orbit, as NASA astronauts Bob Behnken and Doug Hurley head to the International Space Station. They should arrive at the space station on Sunday at about 10:30 a.m. ET.

Read more about the mission's successful launch here.

3:32 pm: The Falcon 9 rocket booster lands

SpaceX landed the Falcon 9 rocket booster on the company's ocean droneship, as the Crew Dragon spacecraft continues on toward orbit with NASA astronauts Bob Behnken and Doug Hurley on board.

3:22 pm: The rocket lifts off

The SpaceX Falcon 9 rocket fired up its engines and took off, launching two NASA astronauts in the company's Crew Dragon capsule.

3:17 pm: Five minutes to liftoff

With five minutes to go until launch, the SpaceX Crew Dragon spacecraft has now transitioned to internal power. This is one of the final steps before liftoff.

2:37 pm: SpaceX launch director gives 'go' call to begin fueling the rocket

The SpaceX launch director gave the "go" call to begin fueling the Falcon 9 rocket, with 45 minutes until launch. Next the company will arm the emergency escape system, two minutes before fueling begins. Just moments prior the launch director said that "weather is go at this time," meaning that the predicted thunderstorms in the region are holding off.

2:22 pm: One hour to go until launch, tune into the webcast below

NASA and SpaceX are one hour away from the scheduled liftoff time. You can watch the livestream here.

12:58 pm: NASA chief Bridenstine says thunderstorms may clear before launch

NASA administrator Jim Bridenstine gave an update on the weather forecast, which he said shows thunderstorms headed to the launch area. Bridenstine said that, with launch set for 3:22 p.m., the severe weather could clear by 3 p.m. at the earliest and 3:30 p.m. at the latest. He added that the weather "trend is better today than it was on Wednesday."

12:42 pm: Bob Behnken and Doug Hurley get into the spacecraft

NASA astronauts Bob Behnken and Doug Hurley took an elevator up to the top of the tower at launchpad 39A at Kennedy Space Center. The astronauts walked out to the end of the crew access arm, 255 feet above the ground, and then got into the Crew Dragon spacecraft, where they got strapped in to their seats.

12:25 pm: Astronauts arrive at the launchpad

With less than 3 hours to go until launch, Behnken and Hurley arrived at launchpad 39A, where the Falcon 9 rocket and Crew Dragon spacecraft are waiting to launch them into space.

Crew Dragon astronaut Doug Hurley acknowledges cheers en route to Launch Complex 39A at the Kennedy Space Center in Florida on May 30, 2020.
Gregg Newton | AFP | Getty Images

12:01 pm: NASA astronauts walk out and get into Tesla Model X

NASA astronauts Bob Behnken and Doug Hurley walked out of the Neil Armstrong Operations and Checkout Building and got in the Tesla Model X that will carry them to the launchpad.

11:22 am: NASA astronauts begin suiting up

NASA astronauts Bob Behnken and Doug Hurley are putting on their SpaceX spacesuits, with about 4 hours to go until liftoff.

11:00 am: NASA TV and SpaceX begin webcast

The agency and space company are together hosting nearly 24 hours of coverage of the first portion of the mission, from about four hours before launch until the spacecraft is scheduled to dock with the International Space Station on Thursday.

9:00 am: Air Force forecast shows weather has 50% probability of delaying launch

The latest forecast from the U.S. Air Force's 45th Space Wing showed a 50% probability of another weather delay, which will be watched closely throughout the countdown. The Air Force will be closely watching for thunderstorms that are expected early this afternoon.

7:34 am: SpaceX CEO Elon Musk says they will attempt to launch on Saturday

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