Orbital ATK will become Northrop Grumman's fourth business sector.

An Orbital ATK Cygnus cargo ship arrived at the International Space Station early Thursday (May 24) to deliver more than 3 tons of vital supplies - and likely some goodies, too - for the orbiting laboratory's

An Orbital ATK Antares rocket will launch a Cygnus supply ship Monday morning (May 21) to deliver more than 3 tons NASA cargo to the International Space Station, and you can watch it live online.

An aerospace executive and NASA director who helped lead rocket engine development for the Saturn V booster and space shuttle is being memorialized with the christening of a commercial cargo spacecraft.

Orbital ATK's next rocket will be its biggest one yet, and the company has picked a fitting name for new booster: OmegA.

Orbital ATK announced March 13 it is developing a new version of a satellite life extension vehicle intended to provide more flexibility to customers while also moving the company closer to more advanced

The commercial spaceflight company Orbital ATK successfully launched an Antares rocket today (Nov. 12), providing a Sunday morning spectacle for early birds along the U.S. east coast.

Orbital ATK aborted the launch of a Cygnus cargo ship bound for the International Space Station early Saturday (Nov. 11) when a wayward aircraft flew inside the restricted airspace around NASA's Wallops

A brand-new type of rocket, the Minotaur C, blasted off on its maiden voyage today (Oct. 31) to deliver several new Earth observation satellites into Earth's orbit.

The S.S. John Glenn, Orbital ATK's seventh Cygnus cargo ship to deliver supplies and science for the crew on board the International Space Station, completed a four-day rendezvous to the orbiting laboratory

An Atlas V rocket boosted an Orbital ATK cargo ship into orbit this morning (April 18), setting the stage for the spacecraft's belated but welcome arrival at the International Space Station on Saturday.

Orbital ATK's Cygnus spacecraft is scheduled to launch on a resupply mission to the International Space Station Tuesday (April 18) at 11:11 a.m. EDT from Florida's Cape Canaveral Air Force Station.

Orbital ATK intends to parlay its solid-fuel booster manufacturing capabilities into a new family of medium- and heavy-lift rockets to compete against United Launch Alliance, SpaceX and other companies