science

Soyuz 27

Soyuz 27 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 Soyuz 27 rather than just read about it. In short: Soyuz 27 (Russian: Союз 27, Union 27) was a 1978 Soviet crewed spacecraft which flew to the orbiting Salyut 6 space station, during the mission EP-1. It was the third crewed flight to the station, the second successful docking and the first visitation mission.

Key takeaways

Soyuz 27 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Soyuz 27 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Soyuz 27 from memory before moving on to harder problems.

Reference excerpt

Soyuz 27 (Russian: Союз 27, Union 27) was a 1978 Soviet crewed spacecraft which flew to the orbiting Salyut 6 space station, during the mission EP-1. It was the third crewed flight to the station, the second successful docking and the first visitation mission. Once docked, it marked the first time that three spacecraft were docked together. The main function of the EP-1 mission was to swap Soyuz craft with the orbiting crew, in so doing freeing a docking port for a forthcoming supply tanker. Cosmonauts Vladimir Dzhanibekov and Oleg Makarov returned to Earth in the Soyuz 26 spacecraft after spending five days on the station. The descent module is displayed at the Sergei Pavlovich Korolyov Museum of Cosmonautics in Zhytomyr, Ukraine.

Crew

Backup crew

Mission parameters Mass: 6,800 kilograms (15,000 lb) Perigee: 198.9 kilometres (123.6 mi) Apogee: 253.8 kilometres (157.7 mi) Inclination: 51.65° Period: 88.73 minutes

References

External links

Zimmerman, Robert (6 September 2003). Leaving Earth: Space Stations, Rival Superpowers, and the Quest for Interplanetary Travel. doi:10.17226/10531. ISBN 978-0-309-09739-0. Retrieved 10 August 2017.

Illustrations

Worked examples

Example 1 — a first encounter with Soyuz 27

Start with the simplest possible case. Write down what Soyuz 27 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 Soyuz 27 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 Soyuz 27 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 Soyuz 27

In research: Soyuz 27 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 Soyuz 27 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: Soyuz 27 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1978 in the Soviet Union, Crewed Soyuz missions, Human spaceflights to Salyut space stations, so understanding it makes those chapters shorter.
In everyday life: Look for Soyuz 27 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 Soyuz 27 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Soyuz 27 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 Soyuz 27 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Soyuz 27 in simple terms?

Why does Soyuz 27 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 Soyuz 27?

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 Soyuz 27.