science

Kosmos 849

Kosmos 849 is a science 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 Kosmos 849 rather than just read about it. In short: Kosmos 849 (Russian: Космос 849 meaning Cosmos 849), also known as DS-P1-I No.17 was a satellite which was used as a radar target for anti-ballistic missile tests. It was launched by the Soviet Union in 1976 as part of the Dnepropetrovsk Sputnik programme.

Key takeaways

Kosmos 849 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Kosmos 849 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kosmos 849 from memory before moving on to harder problems.

Reference excerpt

Kosmos 849 (Russian: Космос 849 meaning Cosmos 849), also known as DS-P1-I No.17 was a satellite which was used as a radar target for anti-ballistic missile tests. It was launched by the Soviet Union in 1976 as part of the Dnepropetrovsk Sputnik programme. It was launched aboard a Kosmos-2I 63SM rocket, from Site 133/1 at Plesetsk. The launch occurred at 09:30 UTC on 18 August 1976. Kosmos 849 was placed into a low Earth orbit with a perigee of 264 kilometres (164 mi), an apogee of 865 kilometres (537 mi), 71 degrees of inclination, and an orbital period of 96 minutes. It decayed from orbit on 24 April 1978. Kosmos 849 was the seventeenth of nineteen DS-P1-I satellites to be launched. Of these, all reached orbit successfully except the seventh.

Worked examples

Example 1 — a first encounter with Kosmos 849

Start with the simplest possible case. Write down what Kosmos 849 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Kosmos 849 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 Kosmos 849 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 Kosmos 849

In research: Kosmos 849 appears in science 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 Kosmos 849 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: Kosmos 849 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1976 in spaceflight, Dnepropetrovsk Sputnik program, Kosmos satellites, so understanding it makes those chapters shorter.
In everyday life: Look for Kosmos 849 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 Kosmos 849 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kosmos 849 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 Kosmos 849 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kosmos 849 in simple terms?

Why does Kosmos 849 matter?

Because it connects several science 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 Kosmos 849?

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 Kosmos 849.