Photos: Sun sets on Falcon 9 rocket at Cape Canaveral

Seven astronauts and cosmonauts are gearing up for launches April 9 and April 22 to the International Space Station, replacing seven outgoing crew members set to land in Kazakhstan and off the coast of Florida on April 17 and April 28.

SpaceX launch crews rolled out the company’s next Falcon 9 rocket to pad 39A at the Kennedy Space Center in Florida, then lifted the two-stage launcher vertical for a hold-down engine firing Thursday in preparation for launch next week with a South Korean-owned commercial communications satellite.

Tech giant Amazon is adding a fifth rocket to launch its satellite internet constellation. In a surprise move on Friday afternoon, the company announced it purchased three flights aboard SpaceX’s Falcon 9 rockets to send batched of its Project Kuiper satellites to low Earth orbit.