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The world's richest man Jeff Bezos has thanked Amazon customers for paying for his private spaceflight, which he said was the "best day ever".
Speaking after his safe landing in Texas, the 57-year-old billionaire said: "Thank you from the bottom of my heart. It's very appreciated."
When asked how it felt going into space, the Amazon founder exclaimed: "Oh my God! My expectations were high and they were dramatically exceeded."
Image:Jeff Bezos receives his astronaut's wings after his space flight
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Highlights from Bezos's journey into space
He went on to speak about how zero gravity felt "so normal" but that he could now vouch for the Earth's fragility.
"We're damaging it," he said, adding that being able to see the planet's atmosphere for himself was "very profound".
Mr Bezos
achieved his childhood dream of becoming an astronaut 52 years to the day it was sparked by watching Neil Armstrong and Buzz Aldrin walk on the moon.
He flew 351,210ft to the edge of space from a launch site in West Texas.
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Jeff Bezos' space company Blue Origin launches first human flight
Video has been released of Mr Bezos and his three companions floating freely in the capsule.
He was joined in the mission by his younger brother Mark and the two people who have become the youngest and oldest to travel to space - Dutch 18-year-old Oliver Daemen and 82-year-old aerospace pioneer Wally Funk respectively.
Image:Mr Bezos gives the thumbs up after landing. Pic: Blue Origin
Mr Bezos gave a thumbs up out of the window after touching back down, with cheers of "Wow, that was incredible" heard from inside the capsule.
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Jeff Bezos prepares to blast off as he ventures towards the edge of space and the beginning of commercial spaceflight.
After exiting the pod the tech founder and his brother hugged their parents Jackie and Mike, with Ms Funk thanking the pair for the experience - 60 years after she trained for it but wasn't allowed to go.
At the apogee of their journey, which was 11 minutes in total, the astronauts had an opportunity to take in extraordinary views of Earth and get out of their seats and float around the cabin for about four minutes.
Image:The Amazon founder celebrates as he emerges from the space capsule
Image:Wally Funk celebrates as Mr Bezos hugs his parents. Pic: Blue Origin
The four became the first people to lift off aboard the New Shepard rocket built by the entrepreneur's private spaceflight company Blue Origin.
The crew took several historic items with them, including the pair of goggles used by Amelia Earhart when she flew across the Atlantic.
They also took a brass medal made from the first hot air balloon which flew in 1783, as well ass canvas from the plane flown by the Wright brothers.
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Bezos struck by 'fragility' of Earth from space
During this post-flight press conference, Mr Bezos gave his mother a feather necklace he wore on the voyage.
"I know it's going to change me and I'm excited to find out how," Mr Bezos told CNN in an interview before the flight.
Ms Funk said she felt like she was 24 years old ahead of the launch: "It's great, I love being here."
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Blue Origin celebrates after Jeff Bezos, his crew, and the reusable rocket all touch down in Texas
Dutch teenager Oliver Daemen was Blue Origin's first paying passenger, replacing an anonymous person who had previously bid $28m (£20.6m) for a seat on the flight.
Blue Origin said the mystery bidder knew that the flight was scheduled for 20 July before placing their bid, but they subsequently deferred their place "due to scheduling conflicts".
