astronomy

Sachiko Amari

Sachiko Amari is a astronomy 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 Sachiko Amari rather than just read about it. In short: Sachiko Amari is a Japanese astrophysicist who focuses upon presolar grains. She developed the method for isolating presolar grains in primitive meteorites and also researched noble gases in meteorites.

Key takeaways

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

Reference excerpt

Sachiko Amari is a Japanese astrophysicist who focuses upon presolar grains. She developed the method for isolating presolar grains in primitive meteorites and also researched noble gases in meteorites. Amari was awarded the Urey Medal by the European Association of Geochemistry in 2021. She currently is a Research Professor of Physics at Washington University in St. Louis.

Early life and education Sachiko Amari received her PhD in 1986, at Kobe University, where she studied extra-terrestrial material within deep-sea sediments.

Career and research Sachiko Amari worked as a research assistant with the University of Chicago's Chemistry Department starting in 1988. She then began working at Washington University in St. Louis in 1990 where she currently still works as a Research Professor of Physics. Amari is also a visiting scientist at the Geochemical Research Center at the University of Tokyo, Japan. Sachiko Amari also has been a fellow of the Meteoritical Society since 2000 and is a fellow of the Japan Geoscience Union as of 2022.

Awards and honors 2000 - Meteoritical Society Fellowship 2021 - H.C. Urey Award 2022 - Japan Geoscience Union Fellowship

Publications Matsuda J., Tsukamoto H., Miyakawa C. and Amari S. (2010). Noble gas study of the Saratov L4 chondrite. Meteorit. Planet. Sci. 45, pp. 361-372. Amari S. (2009). Presolar diamond in meteorites. Publ. Astron. Soc. Australia 26, pp. 266-270. Sachiko Amari, Shiho Zaizen, Jun-Ichi Matsuda, An attempt to separate Q from the Allende meteorite by physical methods, Geochimica et Cosmochimica Acta, Volume 67, Issue 24, 2003, Pages 4665-4677, ISSN 0016-7037, https://doi.org/10.1016/j.gca.2003.08.009.

References

Worked examples

Example 1 — a first encounter with Sachiko Amari

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

In research: Sachiko Amari appears in astronomy 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 Sachiko Amari 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: Sachiko Amari is common in secondary-school and first-year university syllabi. It links to neighbouring topics 21st-century Japanese astronomers, 21st-century Japanese women scientists, Japanese astrophysicists, so understanding it makes those chapters shorter.
In everyday life: Look for Sachiko Amari 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 “Sachiko Amari” →

Affiliate

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

How to study Sachiko Amari in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sachiko Amari 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 Sachiko Amari out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sachiko Amari in simple terms?

Why does Sachiko Amari matter?

Because it connects several astronomy 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 Sachiko Amari?

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 Sachiko Amari.