SpaceX sent its Crew Dragon capsule skyward on Saturday for a crucial test of its ability to carry human passengers. Now, slightly more than 24 hours later, the next phase of the test has played out. It went well. The Crew Dragon capsule, designated Demo-1, was able to successfully dock with the International Space Station at roughly 3:00 a.m. ET. Although there was no crew aboard this time, SpaceX's reusable capsule is designed to carry up to seven astronauts to and from Earth's orbit. SEE ALSO: SpaceX kicks off a 'new era in spaceflight' with the Crew Dragon launch The company has been sending an earlier version of its capsule to the ISS for a number of years, but in those instances the space station's robotic arm has helped the smaller vehicle successfully dock. For this test, the Crew Dragon's own navigational system handled the docking procedure — and it happened without issue. Capture confirmed! After making 18 orbits of Earth since its launch, @SpaceX’s #CrewDragon spacecraft successfully attached to the @Space_Station via “soft capture” at 5:51am ET while the station was traveling just north of New Zealand. Watch: t.co/oJKHgK8eV7 pic.twitter.com/xO1rU5cAMM — NASA (@NASA) March 3, 2019 Listen to those cheers. Once the capsule docked, the three-person crew aboard the ISS — all of whom were prepared to evacuate during the docking procedure if something went wrong — opened it up to greet Ripley, the sensor-laden dummy that flew in alongside 400 pounds of supplies and a plush Earth doll. The capsule will remain at the ISS for another five days. The hatch is open! At 8:07am ET, crew members aboard our orbiting laboratory opened the hatch between @SpaceX’s #CrewDragon spacecraft and the @Space_Station. Watch: t.co/oJKHgK8eV7 pic.twitter.com/NKFisziToV — NASA (@NASA) March 3, 2019 .@AstroAnnimal welcomes humans aboard the first @SpaceX #CrewDragon to visit the station and introduces two special guests, Ripley and Little Earth, ushering in the era of @Commercial_Crew. #LaunchAmerica pic.twitter.com/QqzEEgDWzt — Intl. Space Station (@Space_Station) March 3, 2019 As NASA administrator Jim Bridenstine pointed out on Saturday, the SpaceX test represents a "new era" for American space travel. Astronauts in the U.S. have been relying on Russian Soyuz rockets since NASA's fleet was retired in 2011, but those seats are costly. SpaceX's Crew Dragon (and Boeing's similar Starliner capsule) present an alternative, having been developed under NASA's Commercial Crew Program. Space travel is still a costly endeavor, but these capsules were developed in partnership with NASA and the price of a seat is about $ 30 million cheaper. With the successful launch and docking procedure now behind it, only one important test remains for SpaceX's test flight: the return trip. Demo-1 will detach from the ISS on Friday, March 8, and begin the quick journey back to Earth.  It's expected to touch down in the Atlantic Ocean, somewhere off the coast of Florida near Cape Canaveral and the Kennedy Space Center. If that final phase of the test goes well, NASA astronauts could be heading into space aboard non-NASA rockets as soon as summer 2019. WATCH: Elon Musk says Mars round trip could cost only $ 100,000 one day

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