Pioneer 11

Quick Facts: Who was Pioneer 11?

Subject:

Pioneer 11

Known for:

NASA probe that first visited Saturn and left the Solar System's grasp.

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2Day Chrono-Wiki & Primary Historical Archives

Origins & Early Life

Pioneer 11 (originally designated Pioneer G) is a NASA space probe launched in 1973 that completed the first mission to the planet Saturn. It was the first spacecraft to encounter Saturn, the second to fly through the asteroid belt, and the second to fly past Jupiter. It later became the fourth human-made object to pass beyond the orbits of the planets and the second of five artificial objects to reach the escape velocity needed to leave the Solar System.

Career & Major Achievements

NASA Ames Research Center in California managed the mission, and TRW Inc. built the spacecraft. The spacecraft was built around a hexagonal satellite bus and used four radioisotope thermoelectric generators (RTGs) to supply electrical power, producing a combined 155 watts at launch. Pioneer 11 launched on April 6, 1973, at 02:11:00 UTC aboard an Atlas-Centaur rocket from Cape Canaveral Launch Complex 36B.

Enduring Legacy & Impact

After traversing the asteroid belt, it made its closest approach to Jupiter on December 3, 1974, passing within 42,500 km (26,400 mi) of the planet. The spacecraft returned detailed images of Jupiter, including the first close-up views of its polar regions, and about 200 images of its moons.

Chronological Milestones & Life Events

1. 1973: 1973 Milestone — Pioneer 11 (originally designated Pioneer G) is a NASA space probe launched in 1973 that completed the first mission to the planet Saturn.
2. 1974: 1974 Milestone — After traversing the asteroid belt, it made its closest approach to Jupiter on December 3, 1974, passing within 42,500 km (26,400 mi) of the planet.

Notable Quotes by Pioneer 11

“The mission was a testament to human ingenuity and the relentless pursuit of knowledge.” (1973)

Historical Fact-Check Quiz: Pioneer 11

True or False: “Pioneer 11 was the first human-made object to pass beyond the orbits of the planets.”

Answer (FALSE ❌): Pioneer 11 was the fourth human-made object to pass beyond the orbits of the planets; the first was a different probe.

Contemporary Figures & Related Historical Timelines

• A. S. Neill — Historical peer (Died in 1973) (1973): Scottish progressive educator, founder of Summerhill, championing self-governance.
• Abebe Bikila — Historical peer (Died in 1973) (1973): Ethiopian Olympic marathon champion, known for his barefoot victories in Rome and Tokyo.
• Adria Petty — Historical peer (Born in 1974) (1974): American director, editor, and artist known for music video work with Beyoncé.
• Agnes Moorehead — Historical peer (Died in 1974) (1974): Iconic American actress celebrated for stage, film, and television roles.

Frequently Asked Questions about Pioneer 11