SpaceX’s Falcon 9 rocket, which is being used for its Falcon Heavy rocket, launched its first cargo to the International Space Station on Tuesday (June 26).
SpaceX founder Elon Musk said that the cargo will be the first ever crewed trip to the orbiting laboratory, and that it will carry three science experiments.
The trip to space is the culmination of a $1.9 billion contract signed with the U.S. government to help the company develop its own cargo-to-orbit technology.
The company also said it plans to launch the capsule in 2019.
SpaceX says the capsule will be able to carry up to 8,000 pounds of scientific experiments, including the ability to send humans to Mars.
The capsule will carry the same experiments that NASA and the European Space Agency already carry on their Soyuz spacecraft, which are the same type of cargo-carrying craft.
SpaceX and NASA have said they plan to launch a robotic arm, or robotic arm extension, on the capsule later this year, to help extend its orbit and provide more space for experiments.
This article is part of HuffPost Live’s “Behind the Lines” series.