SpaceX successfully lands rocket in middle of ocean

The launch took place in Cape Canaveral, Florida and was the first successful SpaceX launch to the ISS since its failed resupply mission in June 2015.

The Falcon 9 rocket took the Dragon cargo spacecraft to the ISS with 7,000 pounds of supplies. The Dragon cargo spacecraft will stay with the ISS until May and will bring several biological samples back to earth.

SpaceX will be flying similar missions until 2024, per a contract with Nasa. All of SpaceX's capsules are unmanned.

SpaceX streams all of its rocket launches to interested space fanatics.

Now that SpaceX successfully landed a rocket both in the ocean and on land, it can potentially reduce its costs exponentially by recycling the rockets after they're propelled.

Four other attempts ended in the rocket exploding.

SpaceX's president Gwynne Shotwell said the retrieval of the "first stage" -- aka rocket -- could mean 30 percent savings for the space travel company.