SpaceX Crew Dragon

Updated 7:30 p.m. ET Saturday

The two astronauts that blasted off in the first private space vehicle to take people to the International Space Station are about to return to Earth — by splashing down in the waters around Florida.

This will be the first planned splashdown for space travelers since 1975, although a Russian Soyuz capsule did have to do an emergency lake landing in 1976.

Two NASA astronauts have arrived at the International Space Station, 19 hours after launching from Kennedy Space Center in Florida on Saturday. NASA astronauts Doug Hurley and Bob Behnken made the trip on a private space vehicle designed, built and launched by SpaceX.

SpaceX's Crew Dragon capsule docked with the station at 10:17 a.m. ET while flying over the border of northern China and Mongolia.

When NASA astronauts launch from the Kennedy Space Center, it will be the first time humans have blasted off from the U.S. since the end of the space shuttle program in 2011.

The pilot of that final shuttle mission was Doug Hurley, and he's aboard again Wednesday, ready to make history with the launch of SpaceX's Crew Dragon capsule.

Almost 40 years have passed since the last time NASA astronauts blasted off into space on a brand new spaceship.

Now, as NASA looks forward to Wednesday's planned test flight of the SpaceX Crew Dragon with a pair of astronauts on board, some in the spaceflight community have a little bit of déjà vu.