astronomy

Jack Wisdom

Jack Wisdom 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 Jack Wisdom rather than just read about it. In short: Jack Wisdom (born 1953) is an American planetary scientist and Professor of Planetary Sciences at the Massachusetts Institute of Technology. History He received his B.S. from Rice University in 1976 and his Ph.D. from California Institute of Technology in 1981.

Key takeaways

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

Reference excerpt

Jack Wisdom (born 1953) is an American planetary scientist and Professor of Planetary Sciences at the Massachusetts Institute of Technology.

History He received his B.S. from Rice University in 1976 and his Ph.D. from California Institute of Technology in 1981. His research interests are the dynamics of the Solar System. Wisdom pioneered the study of chaos in the solar system. His 1981 dissertation demonstrated for the first time the theoretical reason for the clearing of the Kirkwood gaps in the asteroid belt. His work has also brought to light the chaotic rotation of Hyperion, chaos in the orbital evolution of Pluto, and the chaotic obliquity of Mars which has important implications for the past Martian climate. Work with colleague Gerald Sussman using a specially-built computer demonstrated that the solar system as a whole is chaotic on a timescale of about four million years, confirming results from Jacques Laskar. This work was responsible for "shattering the long-held view of the clockwork motion of the planets." More recently, Wisdom's work has shed light on the complex evolution of the Moon and the tidal heating and dynamics of Enceladus. In addition, Wisdom is credited with developing "numerous analytical and numerical techniques" that are fundamental to modern celestial mechanics, most notably the symplectic map for the n-body problem (developed together with Matthew J. Holman), which "now forms the core of nearly every solar system dynamics integration scheme in use today." Jack Wisdom is co-author of Structure and Interpretation of Classical Mechanics. His 2003 paper in Science on a new geometric phase effect which Wisdom calls "spacetime swimming" has attracted considerable attention, although it is not yet clear whether this effect has practical utility or even can be used to devise new tests of relativistic gravitation theories.

Awards and honors H. C. Urey Prize of the American Astronomical Society (1986) Helen B. Warner Prize for Astronomy of the AAS (1987) The asteroid 3402 Wisdom was named in his honor (1988) MacArthur Fellowship from the MacArthur Foundation (1994) Brouwer Award of the Division on Dynamical Astronomy of the American Astronomical Society (2001) Elected a Legacy Fellow of the American Astronomical Society in 2020.

External links Wisdom's academic home page Spacetime swimming from Chris Van Den Broeck (Astronomy, University of Wales)

References

Worked examples

Example 1 — a first encounter with Jack Wisdom

Start with the simplest possible case. Write down what Jack Wisdom 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 Jack Wisdom 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 Jack Wisdom 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 Jack Wisdom

In research: Jack Wisdom 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 Jack Wisdom 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: Jack Wisdom is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1953 births, American planetary scientists, California Institute of Technology alumni, so understanding it makes those chapters shorter.
In everyday life: Look for Jack Wisdom 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 Jack Wisdom in 20 minutes

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

Frequently asked questions

What is Jack Wisdom in simple terms?

Jack Wisdom (born 1953) is an American planetary scientist and Professor of Planetary Sciences at the Massachusetts Institute of Technology. History He received his B.S. from Rice University in 1976 and his Ph.D. from California Institute of Technology in 1981.

Why does Jack Wisdom 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 Jack Wisdom?

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 Jack Wisdom.