"Star Trek" actor William Shatner is set to boldly go where no 90-year-old has gone before when he blasts off to space Wednesday on Blue Origin's second crewed mission.

The Canadian -- who will forever be known to the sci-fi show's legion of "Trekkies" as Captain James Tiberius Kirk -- will launch from the company's West Texas base at 9 am (1400 GMT), after a day's delay due to high winds.

He will be joined on the New Shepard rocket by Blue Origin executive Audrey Powers, Planet Labs co-founder Chris Boshuizen, and Glen de Vries, a co-founder of clinical research platform Medidata Solutions.

The crew's roughly 11-minute hop beyond the Karman Line -- 62 miles (100 kilometers) into the air, just beyond Earth's atmosphere -- and back down again with a parachute landing in the desert is a replay of Blue's maiden human flight in July.

That trip, which included company owner Jeff Bezos of Amazon, was seen as a breakthrough moment for the nascent space tourism sector.

This time around, nearly all attention will be focused on Shatner, who at 90 will become the oldest-ever astronaut, despite an appearance that suggests a man who could be decades younger. 

The intergalactic voyages of the "Star Trek" Enterprise ship, commanded by Captain Kirk, helped turn American attention to the stars as the US space program was in its infancy.

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