Unlike the hit song played nonstop on the radio or your mother questioning you about when you’re going to give her grandchildren, rocket launches are one thing that never gets old. That’s lucky, because SpaceX has done two in the span of just four days. Today, the company again launched its Falcon 9 rocket, this time with 2,630 kilograms (5800 pounds) of deliveries to the International Space Station, from the base in Cape Canaveral, Florida.

The theme for this launch: reusable. One of the Falcon boosters first flew on the CRS-12 mission in August 2017. And this particular Dragon module flew in April 2016, on the CRS-8 mission. It’s the first time two reused (or, as SpaceX calls it, “flight-proven”) components have been combined in a single mission.

This marks SpaceX’s 14th successful flight for Dragon, and 15th flight overall (CRS-7, in 2015, failed before reaching orbit). It’s the end of the line for this particular first stage — SpaceX did not attempt to recover it, though the engineers did gather information about it to improve future missions.

Today’s launch was perfectly choreographed, no surprises. It’s a testament to how efficiently SpaceX now operates with missions like these. They’ve really got it down to a science. Things can still happen, of course, but nothing abnormal did today.

The Dragon is en route to deliver food, gear, and other supplies to the ISS, according to Space.com. It also contains materials for 50 science experiments conducted there, one fifth of the total experiments on board (more info about research on board the ISS can be found here). According to the Kennedy Space Center website and Space.com, those include:

An Earth observatory that will study thunderstorms and how they affect Earth’s atmosphere and climate.

An investigation about how to best make products from metal powders in low gravity in order to improve manufacturing techniques.

investigation how to best make products from metal powders in low gravity in order to improve manufacturing techniques. Experiments on how to best give plants the proper nutrients as part of continued studies to grow food in space.

Studies that analyze how fruit flies and wasps interact in microgravity

A study that assesses how space affects bone marrow, blood production, and wound healing

It’s not necessarily as exciting as, say, launching a cherry red sports car into the ether. But it’s still pretty dope.

If everything continues to go according to plan, the Dragon will get within docking range of the ISS around 7 AM ET on Wednesday, April 4, at which point “ISS crew members will use the station’s 57.7-foot (17.6- meter) robotic arm to reach out and capture the Dragon spacecraft and attach it to the orbiting laboratory,” notes a SpaceX press release. And you thought those claw machine games were stressful.

Dragon will be back again. After a month-long stint at the ISS, it’s slated to return to Earth, where, if its descent goes well, it will plop right into the Pacific near Baja California.