physics

John Hirasaki

John Hirasaki is a physics 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 Hirasaki rather than just read about it. In short: John Hirasaki (born 1941) is an American mechanical engineer who worked for the United States' National Aeronautics and Space Administration (NASA) during the Apollo 11 mission, the first crewed mission to the Moon. In 1969 he – along with Buzz Aldrin, Neil Armstrong, Michael Collins, and William Carpentier – became one of the first five known humans to view lunar rocks inside Earth's atmosphere.

Key takeaways

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

Reference excerpt

John Hirasaki (born 1941) is an American mechanical engineer who worked for the United States' National Aeronautics and Space Administration (NASA) during the Apollo 11 mission, the first crewed mission to the Moon. In 1969 he – along with Buzz Aldrin, Neil Armstrong, Michael Collins, and William Carpentier – became one of the first five known humans to view lunar rocks inside Earth's atmosphere.

Early life and education Hirasaki was born in Vidor, Texas. He attended Vidor High School and later went on to graduate from Lamar State College of Technology, where he received a Bachelor of Science degree in Mechanical Engineering in 1964.

Career Hirasaki was hired by the Landing and Recovery Division of the Manned Spacecraft Center of NASA in 1966.

Apollo 11

The Apollo 11 mission represented the first contact of humans with a non-Earth surface and concern was expressed by the National Academies of Science that the returning astronauts and spacecraft might inadvertently carry extraterrestrial life which could pose a "catastrophic" risk to humankind. Anxiety was exacerbated by the presence of President of the United States Richard Nixon aboard USS Hornet, the United States Navy aircraft carrier tasked with recovery of the astronauts. To address these issues, a Mobile Quarantine Facility (MQF) was installed aboard the ship in which the returning astronauts, as well as flight surgeon William Carpentier, would be isolated. According to Hirasaki, four NASA engineers responded to a call for volunteers for a technician to be present inside the MQF during the quarantine period for necessary maintenance, and to physically remove the lunar rocks that had been recovered by the mission. Prior to the recovery, the engineers drew straws, Hirasaki drawing the short straw. He spent the next three weeks in quarantine with the astronauts and Carpentier. Hirasaki noted that, prior to the mission, he had read the Michael Crichton book The Andromeda Strain; however, he felt the risks to his personal safety were "very, very minimal." After removing the recovered lunar rocks to the MQF, Hirasaki opened the containment pouch in which they were stored so that he, Buzz Aldrin, Neil Armstrong, Michael Collins, and William Carpentier could look at them, making him one of the first five known human beings in history to view lunar rocks inside the atmosphere of Earth. In his 1974 autobiography, Carrying the Fire, Michael Collins described Hirasaki as "quiet, flexible, unobtrusive" and said that both he and William Carpentier were "good choices" to join the astronauts in the MQF.

Personal life Hirasaki's grandfather was the farmer and businessman Kichimatsu Kishi. His uncle, Taro Kishi, was the first Asian-American to attend Texas A&M University and, as a member of that school's football team, the first person of Japanese ancestry to play intercollegiate football in the history of the Southwest Conference. Hirasaki lived for many years in Dickinson, Texas. As of 2023, he lives in Culver City, California.

References

External links

Illustrations

Worked examples

Example 1 — a first encounter with John Hirasaki

Start with the simplest possible case. Write down what John Hirasaki claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, 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 Hirasaki 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 Hirasaki 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 Hirasaki

In research: John Hirasaki appears in physics 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 Hirasaki 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 Hirasaki is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1941 births, American mechanical engineers, American people of Japanese descent, so understanding it makes those chapters shorter.
In everyday life: Look for John Hirasaki 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “John Hirasaki” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study John Hirasaki in 20 minutes

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

Frequently asked questions

What is John Hirasaki in simple terms?

Why does John Hirasaki matter?

Because it connects several physics 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 Hirasaki?

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 Hirasaki.