SpaceX sends 3 tons of supplies on its 31st resupply mission to the ISS for NASA (video).

A Falcon 9 rocket lifted off from Pad 39A at NASA’s Kennedy Space Center (KSC) in Florida today at 9:29 p.m. EST (0129 GMT on Tuesday, Nov. 5), kicking off SpaceX‘s 31st robotic resupply mission to the ISS for NASA.

The Falcon 9’s first stage came back to Earth about 8 minutes after liftoff as planned, touching down at Cape Canaveral Space Force Station, which is next door to KSC. It was the fifth launch and landing for this particular booster, according to a SpaceX mission description.

The rocket’s upper stage, meanwhile, hauled an uncrewed Cargo Dragon capsule to low Earth orbit, deploying it there around 9.5 minutes after launch. The Dragon then began chasing down the ISS; it will ultimately meet up with the orbiting lab on Tuesday (Nov. 5) around 10:15 a.m. EST (1415 GMT). You can watch the rendezvous live via NASA, beginning at 8:45 a.m. EST (1245 GMT).

“In addition to food, supplies, and equipment for the crew, Dragon will deliver several new experiments, including the Coronal Diagnostic Experiment, to examine solar wind and how it forms,” NASA officials wrote in a mission preview.

“Dragon also delivers Antarctic moss to observe the combined effects of cosmic radiation and microgravity on plants,” they added. “Other investigations aboard include a device to test cold welding of metals in microgravity, and an investigation that studies how space impacts different materials.”

Also aboard the Dragon is LignoSat, a tiny wooden probe developed by researchers at Kyoto University and the Japanese logging company Sumitomo Forestry that could help open up a new realm of more environmentally friendly spacecraft manufacturing.

“The main objective here is to determine whether wood can be used in space,” Meghan Everett, the deputy chief scientist for NASA’s International Space Station program, said in a prelaunch briefing today. “Student researchers will measure the temperature and strain of the wooden structure and see how it might change in the vacuum environment of space, and the atomic oxygen and radiation conditions as well.”

SpaceX has been launching operational cargo missions to the ISS for NASA since 2012.

Elon Musk‘s company also holds a NASA contract to fly astronauts to and from the orbiting lab, which it fulfills using the Falcon 9 and a crewed version of the Dragon capsule. SpaceX is in the middle of its ninth contracted astronaut mission, which launched on Sept. 28.

Tonight’s cargo liftoff continues a very busy year for SpaceX. The company has launched more than 100 missions already in 2024, the majority of them dedicated to building out its Starlink internet megaconstellation.

Editor’s note: This story was updated at 4 p.m. EST on Nov. 4 with news from the prelaunch press conference on that day. It was updated again at 9:50 p.m. EST on Nov. 4 with news of successful launch, rocket landing and Dragon deployment.