There is another way, however, to feel what it feels like to float in space like an astronaut for a 90-minute trip at a mere $7,500 per person.
The Zero Gravity Experience allows adventurers to lay, flip, float, somersault and fall upside down in the hollowed-out cabin of a Boeing 727, said Zero G Corporation CEO Matt Gohd.
When the modified G-Force One plane gets to an altitude of 24,000 feet 7,300 m the pilots start to climb and then push the plane over the top of a parabolic arc.
There is also a free fall to passengers - they feel trapped for 20 to 30 seconds until the plane descends back to 24,000 feet. Pilots repeat the maneuver about 15 times during the flight.
On Wednesday, a SpaceX rocket from Florida blasted off carrying billionaire e-commerce executive Jared Isaacman and three other people he chose in the first crew to orbit Earth.
It was the first flight of Elon Musk's new orbital tourism business by SpaceX owner SpaceX. Rival companies, Virgin Galactic Holdings Inc and Blue Origin, launched their own pilot services this summer, but these suborbitals flights lasted only minutes.
The Virgin founder Richard Branson has been offering flights since 2004, and counts the airline company Zero G among its customers : Buzz Aldrin, Musk, astronaut Elon Musk and physicist Stephen Hawking.
This year, Gohd said there will be 65 to 70 flights. Amid the increase in interest in space travel, Gohd expects that to rise to about 100 flights next year.
When people go up on the flight everybody grins, says Gohd about the feeling of weightlessness.