science

Progress M-61

Progress M-61 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 Progress M-61 rather than just read about it. In short: Progress M-61 (Russian: Прогресс М-61), identified by NASA as Progress 26P, was a Progress spacecraft used to resupply the International Space Station. It was a Progress-M 11F615A55 spacecraft, with the serial number 361.

Key takeaways

Progress M-61 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Progress M-61 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Progress M-61 from memory before moving on to harder problems.

Reference excerpt

Progress M-61 (Russian: Прогресс М-61), identified by NASA as Progress 26P, was a Progress spacecraft used to resupply the International Space Station. It was a Progress-M 11F615A55 spacecraft, with the serial number 361.

Launch Progress M-61 was launched by a Soyuz-U carrier rocket from Site 1/5 at the Baikonur Cosmodrome. Launch occurred at 17:33:47 UTC on 2 August 2007.

Docking The spacecraft docked with the Pirs module at 18:40 UTC on 5 August 2007. It remained docked for almost 139 days before undocking at 03:59 UTC on 22 December 2007. Following undocking it conducted technological experiments and research as part of the Plazma-Progress programme for a month prior to being deorbited. It was deorbited at 19:06 UTC on 22 January 2008. The spacecraft burned up in the atmosphere over the Pacific Ocean, with any remaining debris landing in the ocean at around 19:51 UTC. Progress M-61 carried supplies to the International Space Station, including food, water and oxygen for the crew and equipment for conducting scientific research.

Illustrations

Worked examples

Example 1 — a first encounter with Progress M-61

Start with the simplest possible case. Write down what Progress M-61 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 Progress M-61 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 Progress M-61 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 Progress M-61

In research: Progress M-61 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 Progress M-61 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: Progress M-61 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Progress (spacecraft) missions, Russian spacecraft stubs, Spacecraft launched by Soyuz-U rockets, so understanding it makes those chapters shorter.
In everyday life: Look for Progress M-61 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 Progress M-61 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Progress M-61 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 Progress M-61 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Progress M-61 in simple terms?

Why does Progress M-61 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 Progress M-61?

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 Progress M-61.