science

Soyuz TM-7

Soyuz TM-7 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 TM-7 rather than just read about it. In short: Soyuz TM-7 was a crewed Soyuz spaceflight to Mir. It launched on 26 November 1988, at 15:49:34, and was the start of the fourth long duration expedition to Mir, Mir EO-4.

Key takeaways

Soyuz TM-7 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 TM-7 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Soyuz TM-7 from memory before moving on to harder problems.

Reference excerpt

Soyuz TM-7 was a crewed Soyuz spaceflight to Mir. It launched on 26 November 1988, at 15:49:34, and was the start of the fourth long duration expedition to Mir, Mir EO-4. The crew would join the third crew member of EO-4, cosmonaut/physician Valeri Polyakov, who was on Mir for the second half of EO-3. Also launched by Soyuz TM-7 was French astronaut Jean-Loup Chrétien, who would take part in the 24-day French mission known as Mir Aragatz. The spacecraft Soyuz TM-7 remained docked to Mir for the duration of EO-4. At the end of EO-4 in April 1989, due to delays in the launch schedule, Mir was left uncrewed, and all three EO-4 crew members were transported back to Earth.

Crew

Backup crew Aleksandr Viktorenko Aleksandr Serebrov Michel Tognini

Mission parameters Mass: 7,000 kg 15,400 lb Perigee: 194 km (120 mi) Apogee: 235 km (146 mi) Inclination: 51.6° Period: 88.8 minutes

Mission highlights The original launch date of November 21 was moved back to permit French president François Mitterrand to view the launch, which was also attended by David Gilmour and Nick Mason of Pink Floyd, who made an audio recording of the event for potential use in a future project. The spacecraft arrived at the Mir station carrying a three-man crew, including French cosmonaut Chrétien on his second flight into space. Titov, Manarov, and Chrétien returned to Earth in Soyuz TM-6. Alexander Volkov, Sergei Krikalev, and Valeri Polyakov remained aboard Mir. On 1989 April 28, they left Mir in mothballs and returned to Earth in Soyuz-TM 7. The Soyuz-TM land landing system is effective at reducing velocity in the vertical direction. However, according to cosmonaut Sergei Krikalev, winds at the landing site often impart considerable horizontal velocity. During the rough landing, Krikalev suffered a minor injury to his knee. Preparations for the first EVA involving a non-Soviet/non-U.S. space traveler forced the cosmonauts to cut short a TV meeting with diplomats from 47 countries on December 8. On December 9, Chrétien and Volkov depressurized the multiport docking adapter and clambered outside Mir. Chrétien was first out. He installed handrails, then attached the 15.5 kg (34 lb) Échantillons experiment rack to the handrails by springs and hooks. He also attached electrical wires leading from the rack to Mir's power supply. Échantillons carried five technological experiments with applications to the Hermes shuttle program. Volkov and Chrétien then assembled the 240 kg (530 lb) experimental deployable structure (known as ERA). They attached a mount to handrails on the frustum linking the multiport docking unit to the small-diameter portion of the work compartment. After resolving problems with cables linking ERA to a control panel inside Mir, they attached the folded ERA structure to a support arm on the platform. The structure was designed to unfold to form a flat six-sided structure 1 metre deep by 3.8 metres across. From inside Mir, Krikalev commanded the structure to unfold, but to no avail. Volkov then kicked ERA, causing it to unfold properly. According to Krikalev, taking the ERA outside helped relieve the crowding problems. The EVA lasted 5 hours and 57 minutes. The crew took with them a cassette of Pink Floyd's newly released live album Delicate Sound of Thunder (minus the cassette box, for weight reasons) and played it in orbit; this was claimed by David Gilmour to have been the first rock music recording in space. The tape was left on Mir when the mission crew returned to Earth.

References

Illustrations

Worked examples

Example 1 — a first encounter with Soyuz TM-7

Start with the simplest possible case. Write down what Soyuz TM-7 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 TM-7 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 TM-7 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 TM-7

In research: Soyuz TM-7 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 TM-7 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 TM-7 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1988 in the Soviet Union, Crewed Soyuz missions, France–Soviet Union relations, so understanding it makes those chapters shorter.
In everyday life: Look for Soyuz TM-7 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 TM-7 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Soyuz TM-7 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 TM-7 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Soyuz TM-7 in simple terms?

Soyuz TM-7 was a crewed Soyuz spaceflight to Mir. It launched on 26 November 1988, at 15:49:34, and was the start of the fourth long duration expedition to Mir, Mir EO-4.

Why does Soyuz TM-7 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 TM-7?

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 TM-7.