astronomy

James Kasting

James Kasting 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 James Kasting rather than just read about it. In short: James Fraser Kasting (born January 2, 1953) is an American geoscientist and Distinguished Professor of Geosciences at Penn State University. Kasting is active in NASA's search for habitable extrasolar planets.

Key takeaways

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

Reference excerpt

James Fraser Kasting (born January 2, 1953) is an American geoscientist and Distinguished Professor of Geosciences at Penn State University. Kasting is active in NASA's search for habitable extrasolar planets. He is considered a world leader in the field of planetary habitability, assessing habitable zones around stars. He was elected a member of the National Academy of Sciences in 2018. Kasting also serves on the Advisory Council of METI (Messaging Extraterrestrial Intelligence).

Education Kasting grew up in Huntsville, Alabama, and credits the nearby Marshall Space Flight Center and the Mercury, Gemini, and Apollo rockets for inspiring his interests in space and science. Kasting received an A.B. from Harvard University in 1975. He then went to the University of Michigan, where he worked with Tom Donahue, receiving his M.S. in physics and atmospheric science in 1978, and his Ph.D. in atmospheric science in 1979.

Research Kasting worked as a postdoctoral fellow at the National Center for Atmospheric Research and at NASA Ames Research Center before accepting a position with the space science division at NASA Ames. He has served NASA in various capacities, including co-chairing the scientific working group for the Terrestrial Planet Finder. Kasting joined Penn State University in 1988, but continues to collaborate with NASA. He is interested in atmospheric evolution, planetary atmospheres and paleoclimates. Kasting writes about the geophysical history and status of the Earth, with a focus on atmospherics. He was well known among the geologists for his ground breaking idea on the only long term negative feedback for the atmospheric carbon dioxides: the carbon silica cycle. Together with his PhD student Alex Pavlov, they put a decisive mark on the post-GOE (Great Oxidation Event) oxygen level of greater than 1E-5 Present Atmospheric Level. According to Kasting's calculations, the Earth's oceans will evaporate in about a billion years, while the Sun is still a main sequence star. This date is much earlier than previously thought. He has also considered the habitability criteria of other stellar systems and planets. A 1993 paper on habitable zones was particularly decisive in shaping thinking on this field. Kasting has published two books, The Earth System, and How to Find a Habitable Planet, along with more than 140 publications in research journals. In their popular 2001 work Rare Earth:Why Complex Life is Uncommon in the Universe, Peter Ward and Donald Brownlee note: "Although many scientists have been doggedly pursuing the various attributes necessary for a habitable planet...one name stands out in the scientific literature: James Kasting." Kasting is also a member of numerous professional scientific societies and committees. He was elected Fellow of both the American Academy of Arts and Sciences and Geochemical Society in 2008. He is also a fellow of the American Geophysical Union (2004), International Society for the Study of the Origin of Life (2002), and the American Association for the Advancement of Science (1995). He serves on the advisory board of the Lifeboat Foundation.

“Even if we search the cosmos and come up with a negative result, if we see a bunch of Earth-like planets and none of them have life, we’ll know we hold a very special place in the universe,” Kasting said. “But I was a fan of Carl Sagan growing up, and Sagan was much more optimistic than that. And I’m more optimistic also.”

Awards He won a LExEN Award for his work "Collaborative Research: Methanogenesis and the Climate of Early Mars". He won the Oparin Medal, presented by the International Society for the Study of the Origin of Life, in 2008.

Stanley Miller Medal (2016)

Personal life He is married with three children.

References

Worked examples

Example 1 — a first encounter with James Kasting

Start with the simplest possible case. Write down what James Kasting 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 James Kasting 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 James Kasting 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 James Kasting

In research: James Kasting 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 James Kasting 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: James Kasting is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1953 births, American astrobiologists, American geophysicists, so understanding it makes those chapters shorter.
In everyday life: Look for James Kasting 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 James Kasting in 20 minutes

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

Frequently asked questions

What is James Kasting in simple terms?

Why does James Kasting 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 James Kasting?

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 James Kasting.