Skip to content

MARS Associates

For Retirees of LM, ULA, and Legacy Companies

  • Home
  • About
    • MARS Officers & Directors
    • Policy Documents
    • MARS Overview
  • Benefits
    • Dental Plans
    • Vision Plans
    • Hearing Aid Discounts
    • Pre-Medicare
    • Understanding Medicare
    • VIA Benefits
    • ULA Benefits Contacts
    • Local Discounts
    • LM Corporate Discounts
    • Tax Adjustments
    • Informational Sessions Presentations
    • What to do when your loved one dies
  • Events
    • Calendar
    • Full Year Calendar
    • Special Activities
      • Special Event Planning Steps
    • Event Photos
  • Membership
    • Membership Renewal
    • New Member Application
    • Member Contact
    • Volunteer
    • MARS Logo Store
  • Clubs
    • Bridge Club
    • MARS Car Club
    • Golf Club
    • Hiking Club
    • PACESETTERS Club
    • Photography Club
    • LM Clubs & Leagues
  • Communications
    • MARS STAR
      • Archive
    • In Memoriam
    • Website Team
  • History
    • On This Day
    • MARS Moments
    • Brief History of LM Denver
    • Martin Marietta Archives
  • Toggle search form

On this day – April 23

Posted on April 23, 2025March 29, 2025 By Barb Sande

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

The earliest event was in 1957, the latest event was in 1976. 

No milestone events (5 to 65+ years ago)

Human Spaceflight:

NONE

Military and Classified Programs:

1964 – LAUNCH: Classified mission, GD Atlas/Lockheed Agena D, SLC4W, VAFB 

Exploration and Interplanetary Programs:

1962 – LAUNCH: Ranger 4, GD Atlas/Lockheed Agena B, LC12, CCAFS

Earth-Monitoring and Civil Weather Satellite programs:

NONE

Commercial Programs:

NONE

Test, ICBM, FBM programs:

1976 – LAUNCH (2): Lockheed Poseidon C3, SSBN644, ETR

Other:

1957 – Vandenberg Air Force Base established on the north end of Camp Cooke, California

The photo today is the launch of the Ranger 4 spacecraft by Atlas/Agena B in 1962.  Ranger 4 crashed on the far side of the moon without returning any data. It was the first American spacecraft to contact another solar system body.   Photo Credit: NASA. 

April 23 – Launch of Ranger 4 on Atlas/Agena B. Photo Credit: NASA.
On This Day

Post navigation

Previous Post: On this day – April 22
Next Post: On this day – April 24

Related Posts

  • On this day – September 23 On This Day
  • On this day – May 9 On This Day
  • On this day – October 24 On This Day
  • On this day – June 15 On This Day
  • On this day – February 25 On This Day
  • On this day – January 4 On This Day

More Related Articles

On this day – June 12 On This Day
On this day – May 27 On This Day
On this day – September 12 On This Day
On this day – August 23 On This Day
On this day – July 23 On This Day
On this day – May 15 On This Day

About us

MARS Associates
PO Box 1128
Littleton, CO 80160-1128

Suggestion Box

Find us on Facebook

Copyright © 2025 MARS Associates