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On this day – April 29

Posted on April 29, 2025April 2, 2025 By Barb Sande

The events on this day in history for our heritage companies are noted below.

The earliest event was in 1958, the latest event was in 2008

Three milestone events (5 to 65+ years ago)

Human Spaceflight:

1985 – LAUNCH: STS-51-B (Challenger), LC39A, KSC – 7 person crew, Spacelab3/Microgravity experiments. Crew: Robert Overmyer, Frederick Gregory, Don Lind, Norman Thagard, William Thornton, Lodewijk van der Berg, Taylor Wang – MILESTONE: 40 years ago

1990 – LANDING: STS-31 (Discovery), Edwards AFB – MILESTONE: 35 years ago

Military and Classified Programs:

1962 – LAUNCH: Lockheed Corona 40, Thor/Lockheed Agena B, SLC1W, VAFB

1964 – LAUNCH: Classified mission, Thor SLV-2A/Lockheed Agena D, SLC3W, VAFB 

Exploration and Interplanetary Programs:

2008 – LM POLAR spacecraft ends operation after 12 years

Earth-Monitoring and Civil Weather Satellite programs:

1958 – LAUNCH FAILURE: Vanguard TV-5, Martin Vanguard TV-5, LC-18A

Commercial Programs:

NONE

Test, ICBM, FBM programs:

1960 – LAUNCH: Lockheed Polaris A1, LC29A, CCAFS – MILESTONE: 65 years ago

1977 – LAUNCH: Lockheed Trident C4, LC25C, CCAFS

Other:

NONE

The photos today are from the STS-51-B mission in 1985, including the launch, the crew and the experiments in the Spacelab3.  Photo Credits: NASA. 

April 29 – Launch of STS-51-B. Photo Credit: NASA.
April 29 – Crew of STS-51-B (see text for crew names). Photo Credit: NASA.
April 29 – STS-51-B crew performs experiments in the SpaceLab. Photo Credit: NASA.
On This Day

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