October 28, 2025
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Delta

Delta 4

Launch of solar probe scrubbed by technical issue in terminal countdown

August 11, 2018 Stephen Clark

An automatic alarm in the final two minutes of the Delta 4-Heavy rocket’s countdown early Saturday forced officials to delay blastoff with NASA’s Parker Solar Probe by 24 hours.

Delta 4

Photos: Delta 4-Heavy revealed for solar probe launch

August 11, 2018 Stephen Clark

These photos taken Friday evening show the mobile gantry being wheeled away from a United Launch Alliance Delta 4-Heavy rocket at Cape Canaveral, hours before its scheduled blastoff with NASA’s Parker Solar Probe.

Delta 4

Delta 4-Heavy launch timeline with Parker Solar Probe

August 11, 2018 Stephen Clark

A United Launch Alliance Delta 4-Heavy rocket, crowned by a solid-fueled upper stage kick motor, will send NASA’s Parker Solar Probe on a speedy voyage through the inner solar system following liftoff from Cape Canaveral.

Delta 4

Watch the Parker Solar Probe pre-launch mission briefing

August 10, 2018 Spaceflight Now

NASA held a pre-launch briefing for the Parker Solar Probe mission on Thursday, August 9, 2018, at the Kennedy Space Center.

Delta 4

Live coverage: Delta 4-Heavy launches with NASA solar probe

August 10, 2018 Stephen Clark

A United Launch Alliance Delta 4-Heavy rocket climbed into space Sunday with NASA’s Parker Solar Probe on a daring mission to explore the atmosphere of the sun. Liftoff from Cape Canaveral occurred at 3:31 a.m. EDT (0731 GMT).

Mission Reports

Parker Solar Probe cleared for launch to ‘touch the sun’

August 9, 2018 William Harwood

NASA managers Thursday cleared the $1.5 billion Parker Solar Probe for launch early Saturday on a daring mission to “touch the sun,” repeatedly flying through its outer atmosphere to find out why the blazing corona is millions of degrees hotter than our star’s visible surface.

Delta 4

Photos: Delta 4 blasts off from Vandenberg’s historic SLC-6 launch pad

January 16, 2018 Stephen Clark

A United Launch Delta 4 rocket lifted off Friday from the SLC-6 launch pad at Vandenberg Air Force Base in California, powering into orbit from a historic seaside complex originally developed for crewed missions.

Delta 4

Delta 4 rocket successfully lofts clandestine NRO satellite into orbit

January 13, 2018 Stephen Clark

A United Launch Alliance Delta 4 rocket climbed into orbit Friday from Vandenberg Air Force Base in California with a top secret spy satellite, adding a new set of eyes in the sky for the U.S. government’s intelligence community and nudging part of the Delta 4 family closer to retirement.

Delta 4

Watch a replay of the Delta 4 NROL-47 launch

January 12, 2018 Spaceflight Now

Watch a replay of the United Launch Alliance Delta 4 rocket launching from Vandenberg Air Force Base in California, hauling into orbit a new eye in the sky for the National Reconnaissance Office.

Delta 4

Photos: Mobile gantry rolled back to reveal Delta 4 rocket at Vandenberg

January 11, 2018 Stephen Clark

The 32-story-tall mobile service tower at the Delta 4’s launch pad at Vandenberg Air Force Base in California was retracted away from the rocket Thursday in advance of a planned liftoff with a top secret National Reconnaissance Office payload.

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News Headlines

  • SpaceX breaks its California pad turnaround record with sunset Starlink launch
    October 26, 2025
  • SpaceX marks 5th anniversary of first Starlink customer with Sunday satellite launch
    October 25, 2025
  • SpaceX surpasses 2024 orbital launch record with Saturday Starlink mission
    October 24, 2025
  • Airbus, Leonardo and Thales agree to form new European company
    October 24, 2025
  • SpaceX expends Falcon 9 booster to launch Spainsat NG 2 communications satellite
    October 23, 2025
  • SpaceX launches 28 Starlink satellites on 550th Falcon 9 mission
    October 22, 2025
  • SpaceX launches 28 Starlink satellites on Falcon 9 rocket from Vandenberg
    October 18, 2025
  • SpaceX launches a Falcon 9 rocket on record-breaking 31st flight
    October 18, 2025
  • Orion spacecraft arrives at VAB ahead of stacking for Artemis 2
    October 17, 2025
  • SpaceX sends 28 Starlink satellites to low Earth orbit in predawn launch
    October 15, 2025
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