Meet 18-year-old Oliver Daemen who went to space with Bezos

Blue Origin's maiden crewed flight on Tuesday involvedfour people who crossed the Karman line, which separates Earth's atmosphere from space, for the very first time.

Here is a brief look at the quartet of soon-to-be astronauts.

JeffBezos, 57, had founded theBlue Origin spaceship company in 2000.Six years before that, he started a small online bookstore called Amazon.com out of his garage.Bezos' net worth is today estimated at more than $200 billion.

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Bezosinvited his brother Mark forride into space. Mark isa financier who directs theBezosFamily Foundation and works as a volunteer firefighter.

The pair are best friendsand Jeff shared the moment he surprised his sibling, six years his junior, by asking him to join the mission in a video that went viral on Instagram last month.

At 82, barrier-breaking woman aviator Wally Funk becamethe oldest ever astronautfulfilling a lifelong dream that was thwarted by the sexism of the early space era.

Funk, who took her first flying lesson aged nine, excelled in the Mercury 13 project which was intended to train women for space using the same standards as male astronautsbut the program was eventually nixed.

She nevertheless had an accomplished career in aviationbecoming the first female air safety investigator for theNational Transportation Safety Boardand serving as chief pilot in several flight schools.

Oliver Daemen, 18, becamethe youngest astronaut. He holds a private pilot's license and is a space enthusiast who will study physics in university this fall.

The Dutch teentook the place ofstill anonymous winner of a $28 million public auction,who asked to pass this time because of "scheduling conflicts," and will go on a later trip.

Daemen's ticket was paid for by his father, the CEO of a private equity firm, CNBC reported.