United Launch Alliance (ULA) will launch 27 Amazon Leo satellites on an Atlas V rocket from Cape Canaveral on Monday, Dec. 15, at 3:49 a.m. EST.

Amazon Leo, formerly Project Kuiper, aims to build a 3,200-satellite internet megaconstellation in low Earth orbit across more than 80 launches.

This will be the fourth Atlas V mission for the project, which has already placed 153 satellites in orbit, excluding two prototypes launched in 2023.

The constellation will provide global internet service and compete with SpaceX’s Starlink, which has already launched over 9,000 satellites, Space.com has reported.

Multiple rockets, including SpaceX’s Falcon 9, ULA’s Vulcan Centaur, Blue Origin’s New Glenn, and Arianespace’s Ariane 6, are being used to deploy the network.