SpaceX set to launch its first "block 5" Falcon 9 rocket

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A Falcon 9 rocket has gone vertical on Thursday morning at Launch Complex 39A in Florida, and SpaceX is on track for the liftoff of a brand-new version of its workforce booster.

The launch window opens at 4:12 p.m. EDT, and closes at 6:22 p.m. EDT.

There is another opportunity to launch the rocket at 4:14 p.m. ET Friday, according to Spaceflight Now, which covers space news.

The fun doesn't end with takeoff.

"It is the final substantial upgrade to the Falcon 9 design, although we may make minor upgrades as we continue to strive for rapid reusability and extremely high reliability".

As of Wednesday, the 45th Weather Squadron said the probability for good launch weather Thursday at the Cape as 80 percent.

"With this historical first satellite, Bangladesh inhabitants will have access to a wide range of broadcast and communications services", Thales Alenia Space, the company that designed and built the satellite, said in a statement. In the past, SpaceX rockets have been only capable of making about two trips. But so far, it has relaunched 11 of its workhorse Falcon 9 rockets, one time each.

With just 58 seconds remaining in the countdown, Falcon 9 threw an abort just as the vehicle took over the countdown. BFR is key to SpaceX's plans to colonize Mars and will be launched from the company's south Texas launch site, Musk said Thursday. Block 5 is set to alter this.

SpaceX founder and Tesla CEO Elon Musk said before the launch that a successful test flight could set up the Falcon Heavy's first launch for a paying customer just three to six months later. Block 5 has more powerful engines, much more resilient components to survive the harsh requirements of re-entering the air and landing, less weight (notably by its unpainted components, like the dark interstage) plus a easily generated arrangement.

Maiden launch of Block 5 rocket.

Along with helping SpaceX streamline launch operations, the block 5 booster eventually will be used to launch astronauts to the International Space Station as well as high-priority national security payloads for the Pentagon.