Former Amazon CEO Jeff Bezos flew to the edge of space Tuesday for the 52nd anniversary of the Apollo 11 mission.

In a historic move, Bezos and an all-civilian crew boarded a rocket and capsule developed by his private spaceflight company, Blue Origin, in the first non-piloted, suborbital flight. 

“Best day ever,” the billionaire entrepreneur said after successfully returning back to Earth, USA Today reported.

In true Twitter fashion, people took to the app to show their lack of enthusiasm for Bezos’ trip and clowned him for the rocket's uncanny resemblance. 

Some even called for Amazon to be unionized along with a Change.org petition requesting that Bezos not return back to Earth. 

Last month, the International Brotherhood of Teamsters gathered to vote on a resolution to support Amazon workers, who have repeatedly voiced concerns over the company's working conditions, injury rates and physical demands of the job. 

“The International Brotherhood of Teamsters recognizes that there is no clearer example of how America is failing the working class than Amazon,” according to a copy of the resolution obtained by CNBC. “From its start as a book retailer, Amazon has grown to become an e-commerce giant and has disrupted industry after industry and displaced hundreds of thousands of jobs.”

Bezos responded to critics of his trip into space earlier this week. 

“Well, I say they are largely right. We have to do both," Bezos said in a CNN interview ahead of the journey, referencing the world's many urgent social crises. "We have lots of problems here on Earth and we have to work on those.”

Bezos went and returned from his 10-minute trip into outer space on Tuesday per BBC.