SpaceX's new 'Endeavour' spaceship is poised to make history after undocking from the International Space Station with 2 NASA astronauts aboard

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SpaceX has entered the final stage of its historic first flight of people: NASA astronauts Bob Behnken and Doug Hurley are on their way home.

Behnken and Hurley boarded the company's new Crew Dragon spaceship on Saturday, undocked from the International Space Station, and flew away.

The crew is now targeting a landing of their ship, which they named "Endeavour," in the Gulf of Mexico on around 2:41 p.m. ET on Sunday.

Elon Musk, the founder of SpaceX, has described the landing phase as his "biggest concern" for the mission.

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Bob Behnken and Doug Hurley are on their way home.

The two NASA astronauts departed the International Space Station on Saturday evening, beginning a roughly day-long voyage to their families on Earth.See the rest of the story at Business InsiderNOW WATCH: Why NASA waited nearly a decade to send astronauts into space from the USSee Also:SpaceX has a 'go' from NASA to return 2 astronauts to Earth on Sunday as Hurricane Isaias threatens several Florida splashdown locationsMeet Doug Hurley and Bob Behnken, 2 'badass' astronauts, engineers, and dads who are flying SpaceX's Crew Dragon back to Earth this weekendElon Musk appeared to imply that Jeff Bezos is too old and Blue Origin is 'too slow' to reach the moonSEE ALSO: 'I doubted us': Elon Musk says it took 100,000 people to launch 2 NASA astronauts into orbit and that he wasn't sure SpaceX would ever pull off the feat

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