science

Mir EO-3

Mir EO-3 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 Mir EO-3 rather than just read about it. In short: Mir EO-3 (also called Mir Principal Expedition 3) was an expedition to the space station Mir. The crew consisted of 3 people, Musa Manarov (Commander), Vladimir Titov (Flight Engineer) and Valeri Polyakov (Research Doctor).

Key takeaways

Mir EO-3 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Mir EO-3 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Mir EO-3 from memory before moving on to harder problems.

Reference excerpt

Mir EO-3 (also called Mir Principal Expedition 3) was an expedition to the space station Mir. The crew consisted of 3 people, Musa Manarov (Commander), Vladimir Titov (Flight Engineer) and Valeri Polyakov (Research Doctor). Manarov and Titov arrived at the station in December 1987 on Soyuz TM-4, while Polyakov arrived much later, in August 1988 on Soyuz TM-6. After the arrival of Polyakov, medical experiments became more intensive.

Crew Upon docking to Mir; Titov and Manarov became the third resident crew. Both performed three EVAs. Polyakov joined the crew later separately.

Backup crew Aleksandr Volkov (Commander) Aleksandr Kaleri (Flight Engineer) German Arzamazov (Research Doctor)

Mission highlights In the first week of the mission they performed biological experiments (with onions and fishes for example) and installed the Aynur biological crystal growth apparatus, which they had delivered to the station, into Kvant-1. Titov and Manarov conducted part of an ongoing survey of galaxies and star groups in the ultraviolet part of the spectrum using the Glazar telescope on Kvant. The survey required photography with exposure times of up to 8 minutes. Other work included Earth observation and experiments on the fields of materials sciences, meteorology, space technology, physiology, psychology, medical sciences and astronomical research, using the Marija-research apparatus. In total the crew performed over 2000 experiments.

Mir EP-2

In June 1988, the spacecraft Soyuz TM-5 arrived at the station carrying the three-person visiting crew of Mir EP-2. The crew consisted of two Soviets, Commander Solovyev and Flight Engineer Savinykh, as well as the Bulgarian research cosmonaut Aleksandr Aleksandrov (not to be confused with Soviet cosmonaut Aleksandr Aleksandrov, who was part of the long-duration Mir EO-2 crew). Aleksandrov was the second Bulgarian to fly in space, the first being Georgi Ivanov, who flew on Soyuz 33 but failed to reach Salyut 6 after an engine failure aborted his mission. As a result, Bulgaria was the last Eastern European Soviet ally to not have one of its citizens visit a Soviet space station. Aleksandrov became the first Bulgarian to visit a space station. During his visit, Aleksandrov used nearly 2,000 kg of equipment delivered by Progress spacecraft to conduct 46 experiments in the Shipka program. The visiting EP-2 crew returned to Earth about a week later in the spacecraft Soyuz TM-4, leaving TM-5 as the station's lifeboat.

Polyakov arrives

On 31 August 1988, the spacecraft Soyuz TM-6 arrived at the station, carrying the new EO-3 crew member Valeri Polyakov. Also on TM-6 was the two-person crew of the visiting expedition Mir EP-3, consisting of the commander Vladimir Lyakhov, as well as the first Afghan cosmonaut Abdul Ahad Mohmand. After about a week on the station, Lyakhov and Mohmand returned to Earth in Soyuz TM-5, leaving the fresh TM-6 spacecraft at the station as their new lifeboat. During the descent of TM-6 there were some technical problems, resulting in some tense moments as well as a day-long delay in landing. Nevertheless, they landed safely on 7 September.

Spacewalks The first spacewalk (also known as "Extra-vehicular activity", or EVA) of EO-3 took place on 26 February 1988 (4h 25m) replacing a segment on a solar cell. The second EVA was on 30 June 1988 (5h 10m) in which the replacement of a detector block on the Kvant-1 module failed. New tools were delivered to the station and with this the same work was then successful on 20 October 1988 (4h 12m).

End of mission Mir EO-3 officially concluded on 21 December 1988, when Manarov and Titov returned to Earth in the Soyuz TM-6 spacecraft. The mission in total lasted for 365.94 days, the third longest of all the expeditions. Polyakov stayed aboard the station, and was transferred to Mir EO-4.

Worked examples

Example 1 — a first encounter with Mir EO-3

Start with the simplest possible case. Write down what Mir EO-3 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 Mir EO-3 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 Mir EO-3 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 Mir EO-3

In research: Mir EO-3 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 Mir EO-3 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: Mir EO-3 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1987 in spaceflight, 1987 in the Soviet Union, 1988 in spaceflight, so understanding it makes those chapters shorter.
In everyday life: Look for Mir EO-3 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 Mir EO-3 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Mir EO-3 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 Mir EO-3 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mir EO-3 in simple terms?

Why does Mir EO-3 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 Mir EO-3?

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 Mir EO-3.