Blue Origin has already carried out 10 successful test flights, including one that launched eight NASA experiments. But the company has yet to deliver on its long-promised crewed flights. It first planned to send humans to space in 2018. That was pushed to 2019, and with another uncrewed test planned for late this year, it looks like, at the earliest, Blue Origin might send passengers to space in 2020.

"It's really the robustness of our entire system. It's not one individual thing that's driving [these delays]," Blue Origin CEO Bob Smith told CNBC Tuesday. "It's us being cautious and thorough with the total systems we need to verify." Considering that Blue Origin wants to send the public to space, that caution is understandable. Other companies working on commercial space travel, like Boeing and SpaceX, have faced similar delays and are also still in the uncrewed testing phase.