science

Soyuz MS-25

Soyuz MS-25 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 MS-25 rather than just read about it. In short: Soyuz MS-25, Russian production No. 756 and identified by NASA as Soyuz 71S, was a 2024 Russian crewed Soyuz spaceflight from Baikonur Cosmodrome to the International Space Station. Crew MS-25 saw was the first launch of two women, Tracy Caldwell-Dyson from the United States and Maryna Vasileuskaya from Belarus, aboard a Soyuz spacecraft.

Key takeaways

Soyuz MS-25 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 MS-25 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Soyuz MS-25 from memory before moving on to harder problems.

Reference excerpt

Soyuz MS-25, Russian production No. 756 and identified by NASA as Soyuz 71S, was a 2024 Russian crewed Soyuz spaceflight from Baikonur Cosmodrome to the International Space Station.

Crew MS-25 saw was the first launch of two women, Tracy Caldwell-Dyson from the United States and Maryna Vasileuskaya from Belarus, aboard a Soyuz spacecraft. MS-25 also saw the launch of two people from Belarus, as the mission commander, Oleg Novitsky was born in Chervyen, when it was part of the Byelorussian Soviet Socialist Republic.

Flight

It was originally scheduled for launch on 21 March 2024, but due to a voltage drop in one of the power generators, the launch was aborted. The second launch attempt on 23 March 2024 was successful. Caldwell-Dyson spent approximately six months aboard the International Space Station. Novitsky and Vasileuskaya of Belarus spent approximately 13 days aboard the orbital complex as a part of 21st ISS visiting expedition before returning aboard Soyuz MS-24.

Undocking and Return At the end of Expedition 71, Caldwell-Dyson returned to Earth on Soyuz MS-25 with Roscosmos cosmonauts Oleg Kononenko and Nikolai Chub on 23 September 2024. They arrived with NASA astronaut Loral O'Hara on Soyuz MS-24 on 15 September 2023. O'Hara returned to Earth on MS-24 with Novitsky and Vasileuskaya. Kononenko and Chub remained aboard the orbital laboratory for a year. As the mission lasted 374 days, Kononenko spent a total of 1,111 days in space by the time he returned to Earth. He broke the world record of 878 days in space held by Gennady Padalka on February 4, 2024 at 07:30:08 UTC. He later became the first person to stay 900, 1,000, and 1,100 days in space on 25 February 2024, 4 June 2024, and 12 September 2024 respectively.

References This article incorporates public domain material from NASA Astronaut Tracy C. Dyson Receives Third Space Station Assignment. National Aeronautics and Space Administration.

Illustrations

Worked examples

Example 1 — a first encounter with Soyuz MS-25

Start with the simplest possible case. Write down what Soyuz MS-25 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 MS-25 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 MS-25 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 MS-25

In research: Soyuz MS-25 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 MS-25 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 MS-25 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2024 in Russia, Crewed Soyuz missions, Human spaceflights to the International Space Station, so understanding it makes those chapters shorter.
In everyday life: Look for Soyuz MS-25 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 MS-25 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Soyuz MS-25 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 MS-25 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Soyuz MS-25 in simple terms?

Soyuz MS-25, Russian production No. 756 and identified by NASA as Soyuz 71S, was a 2024 Russian crewed Soyuz spaceflight from Baikonur Cosmodrome to the International Space Station. Crew MS-25 saw was the first launch of two women, Tracy Caldwell-Dyson from the United States and Maryna Vasileuskaya…

Why does Soyuz MS-25 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 MS-25?

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 MS-25.