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Breaking News
  • [ October 4, 2025 ] SpaceX to launch 4 Falcon Heavy rockets as part of newest U.S. national security missions award News
  • [ October 2, 2025 ] SpaceX launches 3rd consecutive Falcon 9 rocket from Vandenberg SFB, uninterrupted by a Cape mission Falcon 9
  • [ October 1, 2025 ] ViaSat-3 F2 satellite arrives in Florida ahead of late October launch Atlas 5
  • [ October 1, 2025 ] Report argues NASA is illegally using President’s Budget Request to circumvent Congress’ budgeting process News
  • [ September 30, 2025 ] Axiom Space taps Portuguese physiologist as first ‘Project Astronaut’ News

Live coverage: Tonight’s Delta 4 countdown and launch journal

August 17, 2016 Justin Ray


(Launch webcast begins at 12:27 a.m. EDT)

Mission Status Center

Live coverage of the United Launch Alliance Delta 4 rocket flight with two GSSAP space situational awareness satellites. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.

  • Air Force
  • Complex 37
  • Delta 375
  • Delta 4
  • GSSAP
  • Mission Status Center
  • United Launch Alliance

Related Articles

Atlas 5

Photos: NROL-55 payload joins Atlas booster rocket for launch

October 4, 2015 Justin Ray

This photo gallery shows the classified National Reconnaissance Office payload, already encapsulated in the 14-foot-diameter nose cone, being lifted atop the United Launch Alliance Atlas-Centaur rocket at Vandenberg Air Force Base for liftoff Oct. 8.

Mission Reports

Live coverage: Space station crew back on Earth

December 14, 2017 Stephen Clark

Outgoing space station commander Randy Bresnik, joined by Russian cosmonaut Sergey Ryazanskiy and European Space Agency flight engineer Paolo Nespoli, returned to Earth early Thursday after nearly five months in orbit. Their Soyuz MS-05 capsule undocked from the International Space Station at 12:14 a.m. EST (0514 GMT), and landed on the steppe of Kazakhstan at 3:37 a.m. EST (0837 GMT).

Mission Reports

Live coverage: India’s PSLV delivers international payloads to orbit

June 22, 2017 Stephen Clark

India launched the 40th Polar Satellite Launch Vehicle mission Friday carrying an Earth observation satellite and 30 secondary payloads from 15 nations. Liftoff occurred at 0359 GMT Friday (11:59 p.m. EDT Thursday).

News Headlines

  • SpaceX to launch 4 Falcon Heavy rockets as part of newest U.S. national security missions award
    October 4, 2025
  • SpaceX launches 3rd consecutive Falcon 9 rocket from Vandenberg SFB, uninterrupted by a Cape mission
    October 2, 2025
  • ViaSat-3 F2 satellite arrives in Florida ahead of late October launch
    October 1, 2025
  • Report argues NASA is illegally using President’s Budget Request to circumvent Congress’ budgeting process
    October 1, 2025
  • Axiom Space taps Portuguese physiologist as first ‘Project Astronaut’
    September 30, 2025
  • Ground testing anomaly destroys Firefly Aerospace’s Alpha booster intended for next flight
    September 30, 2025
  • SpaceX launches 28 Starlink satellites on Falcon 9 rocket from Vandenberg SFB
    September 28, 2025
  • Sierra Space’s Dream Chaser debut mission delayed again, no longer docking to station
    September 26, 2025
  • SpaceX launches 24 Starlink satellites on Falcon 9 rocket from Vandenberg
    September 25, 2025
  • ULA launches third batch of Amazon’s Project Kuiper satellites from Cape Canaveral
    September 25, 2025
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