astronomy

Viktor Safronov

Viktor Safronov 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 Viktor Safronov rather than just read about it. In short: Viktor Sergeevich Safronov (Russian: Ви́ктор Серге́евич Сафро́нов) (born Velikie Luki; 11 October 1917 in Russia – 18 September 1999 in Moscow, Russia) was a Soviet astronomer who put forward the low-mass-nebula model of planet formation, a consistent picture of how the planets formed from a disk of gas and dust around the Sun. Biography and legacy Safronov graduated from Moscow State University Department of Mechan…

Key takeaways

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

Reference excerpt

Viktor Sergeevich Safronov (Russian: Ви́ктор Серге́евич Сафро́нов) (born Velikie Luki; 11 October 1917 in Russia – 18 September 1999 in Moscow, Russia) was a Soviet astronomer who put forward the low-mass-nebula model of planet formation, a consistent picture of how the planets formed from a disk of gas and dust around the Sun.

Biography and legacy Safronov graduated from Moscow State University Department of Mechanics and Mathematics in 1941. He defended a dissertation for the Doctor of Physical and Mathematical Sciences in 1968. His scientific interests covered planetary cosmogony, astrophysics and geophysics. His planetesimal hypothesis of planet formation is still widely accepted among astronomers, although alternative theories exist (such as the gravitational fragmentation of the protoplanetary disk directly into planets). A minor planet, 3615 Safronov, discovered by US-American astronomer Edward L. G. Bowell in 1983, is named after him, as is Safronov Regio on Pluto.

Awards Otto Schmidt USSR Academy of Sciences Prize (1974) Leonard Prize Meteoritical Society (1989) Kuiper Prize in Planetary Science (1990)

Selected publications Evolution of the Protoplanetary Cloud and Formation of the Earth and the Planets. Moscow: Nauka Press, 1969. Trans. NASA TTF 677, 1972.

See also Accretion (astrophysics) George Wetherill

References

External links List of Gerard Kuiper award recipients at the website of American Astronomical Society (in Russian) A short biography

Worked examples

Example 1 — a first encounter with Viktor Safronov

Start with the simplest possible case. Write down what Viktor Safronov 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 Viktor Safronov 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 Viktor Safronov 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 Viktor Safronov

In research: Viktor Safronov 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 Viktor Safronov 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: Viktor Safronov is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1917 births, 1999 deaths, 20th-century Russian scientists, so understanding it makes those chapters shorter.
In everyday life: Look for Viktor Safronov 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 Viktor Safronov in 20 minutes

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

Frequently asked questions

What is Viktor Safronov in simple terms?

Why does Viktor Safronov 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 Viktor Safronov?

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 Viktor Safronov.