A SpaceX Falcon 9 rocket launched the NS-20 mission from Cape Canaveral Space Force Station at 12:07 p.m. EST on Tuesday.
The weather for the launch was perfect. The breezy conditions with a cold front that arrived on Monday subsided on Tuesday, which cleared the way for launch. There was a 95% chance of favorable weather for liftoff, according to the Space Force's 45th Weather Squadron launch forecast. The primary concern around the Spaceport for liftoff was a small chance of cloud cover.
Northrop Grumman and SpaceX are competitors. Both are contractors for NASA's Commercial Resupply Services program, sending supplies to the orbiting laboratory for the space agency.
The Cygnus cargo supply vehicle was previously launched on Northrop Grumman's Antares rocket, but due to the ongoing Russian invasion in Ukraine, the company has been unable to source its Ukrainian and Russian hardware for the vehicle.
Northrop announced last year it is working with Firefly Aerospace to create a new version of the Antares rocket using American-made engines and other hardware.
For the first launch of Cygnus on a Falcon 9 rocket, the SpaceX vehicle's fairings were modified to accommodate the spacecraft. SpaceX normally launches its Cargo Dragon to the ISS with supplies, which does not require fairings.
After launch, SpaceX landed the Falcon 9 booster back at Cape Canaveral Landing Zone 1. The landing created sonic booms that were heard for miles around Florida's Space Coast.
After arriving on Thursday, Cygnus will stay docked at the space station until May. When it departs, it won't return to Earth but will burn up in Earth's atmosphere.