Delta 4
NASA launches Parker Solar Probe mission to study the sun up close
A NASA mission to travel closer to the sun than any previous spacecraft is on its way after a successful launch from Cape Canaveral Aug. 12.
Delta 4 replacement ready by 2023, top general says
The Air Force expects a replacement for the Delta 4 Heavy rocket will be ready by 2023, with one of several vehicles under development able to take its place.
ULA successfully launches Air Force satcom satellite into orbit
The Delta 4 carrying the Wideband Global Satcom 9 satellite lifted off at 8:18 EDT.
ULA delays launch of Air Force satellite due to Delta 4 booster issue
The launch was scheduled for March 8, carrying WGS-9, the Air Force’s next Wideband Global Satcom satellite.
Delta 4 lifts off carrying two Air Force space surveillance satellites
A United Launch Alliance Delta 4 rocket carrying two space surveillance satellites for the U.S. Air Force lifted off early this morning from Cape Canaveral Air Force Station in Florida.
Weather delays launch of spy satellite aboard Delta 4 Heavy
Friday's briefing starts with United Launch Alliance delaying until Saturday the launch of a classified payload for the National Reconnaissance Office
Lawmakers Seek Pentagon Review of ULA’s Delta 4, Aerojet Decisions
Fourteen members of Congress from California ask the Defense Department to examine the company's decisions to retire its Delta 4 rocket and to drop Aerojet Rocketdyne as its solid-rocket booster provider.
NASA Taps Delta 4 Heavy for Solar Probe Plus Launch
That launch, valued at $389 million, will also use a Star-48 upper-stage motor provided by Orbital ATK.
Everything We Know about ULA’s Next Rocket
United Launch Alliance CEO Tory Bruno, who's answering questions Thursday night on Reddit's Ask Me Anything , has been dribbling out details on ULA's nextrocket for weeks. Here's what we know.
