physics

Thanasis Economou

Thanasis Economou 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 Thanasis Economou rather than just read about it. In short: Thanasis Economou (born 6 May 1937) is a Greek nuclear physicist and scientist associated with the University of Chicago's Enrico Fermi Institute. He has developed scientific instruments for interplanetary spacecraft since the mid-1960s and has participated in a number of NASA and other planetary missions.

Key takeaways

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

Reference excerpt

Thanasis Economou (born 6 May 1937) is a Greek nuclear physicist and scientist associated with the University of Chicago's Enrico Fermi Institute. He has developed scientific instruments for interplanetary spacecraft since the mid-1960s and has participated in a number of NASA and other planetary missions. He was one of the scientists who designed and built the Alpha Particle X-ray Spectrometer (APXS) used by the Mars Pathfinder mission in 1997.

Early life and education Economou was born in 1937 in the village of Ziakas, in the Grevena region of northern Greece. He began his schooling at the age of 11 and later studied nuclear physics at Charles University in Prague. According to the Hellenic Astronomical Society, he received an M.S. in Nuclear Physics in 1961 and a postgraduate degree in 1964. In 1964, Economou moved to the United States and joined the Laboratory for Astrophysics and Space Research at the University of Chicago. He subsequently became associated with the university's Enrico Fermi Institute, where he worked on scientific instrumentation for space exploration.

Scientific work

Lunar missions During the 1960s, Economou worked with a research group led by physicist Anthony Turkevich on instruments using alpha-particle backscattering to determine the chemical composition of planetary surfaces. The instruments were used on NASA's Surveyor lunar missions, including Surveyor 5, 6 and 7, which landed on the Moon in 1967 and 1968. The instruments developed for the Surveyor missions formed the basis for later instruments developed by Economou and his collaborators for planetary exploration.

Mars Pathfinder Economou and Anthony Turkevich designed and built the Alpha Particle X-ray Spectrometer (APXS) carried by the Sojourner rover during NASA's Mars Pathfinder mission. The mission landed on Mars in July 1997. The APXS was used to determine the chemical composition of Martian rocks and soil,and performed the first chemical analysis of Martian rocks during the mission. The Pathfinder APXS results were subsequently reported in peer-reviewed research. In 1998, Economou was among members of the Mars Pathfinder team and instrument developers who received the National Air and Space Museum Trophy for Current Achievement.

Other planetary missions Economou subsequently worked on instruments for a number of planetary and space missions. These included the Mars Exploration Rover missions, which carried APXS instruments derived from the Pathfinder instrument, as well as NASA's Cassini mission to Saturn, the Stardust mission to comet 81P/Wild, and the Rosetta mission to comet 67P/Churyumov–Gerasimenko. Economou also participated in the Stardust mission, which carried a dust flux monitor instrument developed by researchers at the University of Chicago. The spacecraft encountered comet Wild 2 in 2004 and was subsequently redirected for the Stardust-NExT mission to comet 9P/Tempel. He has published research on the use of radioactive sources in analytical instruments for planetary exploration.

Greek names on Mars Economou proposed Greek names for several informal locations associated with the exploration of Mars by the Mars Exploration Rover missions, including Agrafa and Kalabaka. Ta Nea referred to Economou as the "godfather of Mars" in connection with his proposals for Greek names for Martian locations.

Awards and recognition In 1998, Economou was among the Mars Pathfinder team members and instrument developers who received the National Air and Space Museum Trophy for Current Achievement. In 2007, he received an honorary doctorate from the Technological Educational Institute of Western Macedonia in Greece. In 2009, Economou received the Niki Award from Friends of Athens Information Technology for his scientific work and contributions to space exploration. In the same year, he received the Paradigm Award from the PanHellenic Scholarship Foundation, which recognized his career in planetary instrumentation and his involvement in space missions.

References

External links University of Chicago directory Thanasis Economou at The Planetary Society Thanasis Economou at the Hellenic Astronomical Society Dr. Thanasis Economou at the PanHellenic Scholarship Foundation

Illustrations

Worked examples

Example 1 — a first encounter with Thanasis Economou

Start with the simplest possible case. Write down what Thanasis Economou 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 Thanasis Economou 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 Thanasis Economou 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 Thanasis Economou

In research: Thanasis Economou 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 Thanasis Economou 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: Thanasis Economou is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1937 births, 20th-century Greek physicists, 21st-century Greek physicists, so understanding it makes those chapters shorter.
In everyday life: Look for Thanasis Economou 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 Thanasis Economou in 20 minutes

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

Frequently asked questions

What is Thanasis Economou in simple terms?

Why does Thanasis Economou 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 Thanasis Economou?

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 Thanasis Economou.