SpaceX hopes to make history with it's launch from Cape Canaveral.
The company owned by Elon Musk will be using a Falcon 9 rocket to put a communications satellite into orbit.
For the first time in history, a rocket will be launched using a second-hand booster. The first-stage rocket booster in tomorrow's launch has been used before by SpaceX, in a Falcon 9 launch last April.
Launch time is 6:27 pm.