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John Glenn

John Glenn is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand John Glenn rather than just read about it. In short: John Herschel Glenn Jr. (July 18, 1921 – December 8, 2016) was an American Marine Corps aviator, astronaut, businessman, and politician.

John Glenn — main illustration
John Glenn — illustration

Key takeaways

  • John Glenn belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect John Glenn to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of John Glenn from memory before moving on to harder problems.

Reference excerpt

John Herschel Glenn Jr. (July 18, 1921 – December 8, 2016) was an American Marine Corps aviator, astronaut, businessman, and politician. He was the third American in space and the first to orbit the Earth, circling it three times in 1962. Following his retirement from NASA, he served from 1974 to 1999 as a U.S. senator from Ohio. In 1998, he flew into space again at the age of 77. Before joining NASA, Glenn was a distinguished fighter pilot in World War II, the Chinese Civil War, and the Korean War. He shot down three MiG-15s and was awarded six Distinguished Flying Crosses and eighteen Air Medals. In 1957, he made the first supersonic transcontinental flight across the United States. His on-board camera took the first continuous, panoramic photograph of the United States. Glenn was one of the Mercury Seven military test pilots selected in 1959 by NASA as the nation's first astronauts. On February 20, 1962, Glenn flew the Friendship 7 mission, becoming the first American to orbit the Earth. He was the third American, and the fifth person, to be in space. He received the NASA Distinguished Service Medal in 1962, the Congressional Space Medal of Honor in 1978, was inducted into the U.S. Astronaut Hall of Fame in 1990, and received the Presidential Medal of Freedom in 2012. Glenn resigned from NASA in January 1964. A member of the Democratic Party, Glenn was first elected to the Senate in 1974 and served for 24 years until January 1999. In 1998, at age 77, Glenn flew on Space Shuttle Discovery's STS-95 mission, making him the oldest person to enter Earth orbit, the only person to fly in both the Mercury and the Space Shuttle programs, and the first Member of Congress to visit space since Congressman Bill Nelson in 1986. Glenn, both the oldest and the last surviving member of the Mercury Seven, died at the age of 95 on December 8, 2016.

Early life and education John Herschel Glenn Jr. was born on July 18, 1921, in Cambridge, Ohio, the son of John Herschel Glenn Sr., who worked for a plumbing firm, and Clara Teresa Glenn (née Sproat), a teacher. His parents had married shortly before John Sr., a member of the American Expeditionary Force, left for the Western Front during World War I. The family moved to New Concord, Ohio, soon after his birth, and his father started his own business, the Glenn Plumbing Company. Glenn Jr. was only a toddler when he met Anna Margaret (Annie) Castor, whom he would later marry. The two would not be able to recall a time when they did not know each other. He first flew in an airplane with his father when he was eight years old. He became fascinated by flight and built model airplanes from balsa wood kits. Along with his adopted sister Jean, he attended New Concord Elementary School. He washed cars and sold rhubarb to earn money to buy a bicycle, after which he took a job delivering The Columbus Dispatch newspaper. He was a member of the Ohio Rangers, an organization similar to the Cub Scouts. His boyhood home in New Concord has been restored as a historic house museum and education center. Glenn attended New Concord High School, where he played on the varsity football team as a center and linebacker. He also made the varsity basketball and tennis teams and was involved with Hi-Y, a junior branch of the YMCA. After graduating in 1939, Glenn entered Muskingum College (now Muskingum University), where he studied chemistry, joined the Stag Club fraternity, and played on the football team. Annie majored in music with minors in secretarial studies and physical education and competed on the swimming and volleyball teams, graduating in 1942. Glenn earned a private pilot license and a physics course credit for free through the Civilian Pilot Training Program in 1941. He did not complete his senior year in residence or take a proficiency exam, both required by the school for its Bachelor of Science degree.

Military career

… excerpt ends here. Continue reading the full article.

Illustrations

John Glenn illustration
John Glenn illustration
John Glenn illustration
John Glenn illustration
John Glenn: Glenn's USAF F-86F, dubbed "MiG Mad Marine", during the Korean War in 1953. The names of his wife and children are also written on the aircraft.
Glenn's USAF F-86F, dubbed "MiG Mad Marine", during the Korean War in 1953. The names of his wife and children are also written on the aircraft.

Worked examples

Example 1 — a first encounter with John Glenn

Start with the simplest possible case. Write down what John Glenn claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to John Glenn before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about John Glenn ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of John Glenn

In research
John Glenn appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses John Glenn in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
John Glenn is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1921 births, 1962 in spaceflight, 1998 in spaceflight, so understanding it makes those chapters shorter.
In everyday life
Look for John Glenn outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study John Glenn in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what John Glenn means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain John Glenn out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is John Glenn in simple terms?

John Herschel Glenn Jr. (July 18, 1921 – December 8, 2016) was an American Marine Corps aviator, astronaut, businessman, and politician.

Why does John Glenn matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study John Glenn?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on John Glenn.

Tags

  • 1921 births
  • 1962 in spaceflight
  • 1998 in spaceflight
  • 2016 deaths
  • 20th-century American businesspeople
  • 20th-century American naval officers
  • 20th-century Ohio politicians
  • 20th-century United States Marines
  • 20th-century United States senators
  • American Freemasons
  • American astronaut-politicians
  • American aviation record holders

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