science

Soyuz MS-27

Soyuz MS-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 MS-27 rather than just read about it. In short: Soyuz MS-27, identified by NASA as Soyuz 73S, was a Russian crewed Soyuz spaceflight that launched on 8 April 2025 from Site 31/6 at the Baikonur Cosmodrome, bound for the International Space Station. The spacecraft was launched aboard a Soyuz-2.1a rocket carrying three crew members, Roscosmos cosmonauts Sergey Ryzhikov and Alexey Zubritsky, along with NASA astronaut Jonny Kim.

Key takeaways

Soyuz MS-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 MS-27 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Soyuz MS-27 from memory before moving on to harder problems.

Reference excerpt

Soyuz MS-27, identified by NASA as Soyuz 73S, was a Russian crewed Soyuz spaceflight that launched on 8 April 2025 from Site 31/6 at the Baikonur Cosmodrome, bound for the International Space Station. The spacecraft was launched aboard a Soyuz-2.1a rocket carrying three crew members, Roscosmos cosmonauts Sergey Ryzhikov and Alexey Zubritsky, along with NASA astronaut Jonny Kim.

Mission

The Soyuz MS-27 spacecraft, assembled by Energia, was transported by rail from its manufacturing facility in Korolev, Russia, to the Baikonur Cosmodrome in Kazakhstan, arriving in December 2024. Final testing and processing commenced in mid-January 2025.⁠ Meanwhile, the components for the Soyuz-2.1a rocket were manufactured by RKTs Progress in Samara, Russia, and shipped by rail to Baikonur, where assembly was underway by the end of January. Final spacecraft preparations resumed in early March. On 24 March, both the primary and backup crews conducted a fit check of their Sokol launch and entry suits and participated in familiarization training inside the flight-ready spacecraft. Propellant loading was completed on 25 March, followed shortly by cargo loading. On 27 March, Soyuz MS-27 was mated to its launch vehicle adapter.⁠ Additional crew training took place on 2 April, as members of Expedition 73 completed their final onboard exercises inside the fully assembled Soyuz MS-27. The following day, the payload section—including the spacecraft—was transported from the processing facility to the vehicle assembly building at Site 31/6, where it was integrated with the Soyuz-2.1a rocket. Integration was completed on 4 April. On the morning of 5 April, the fully assembled launch vehicle was rolled out to the launch pad at Site 31/6. The rocket was decorated with decals to celebrate the 80th anniversary of the end of World War II. Three days later on 8 April at 05:47:15 UTC, Soyuz MS-27 lifted off atop a Soyuz-2.1a rocket from the Baikonur Cosmodrome as scheduled. After an 8-minute 49-second ascent, the third stage engine cutoff occurred, and the Soyuz MS-27 was released into its initial orbit three seconds later. The spacecraft proceeded with a fast-track rendezvous and successfully docked to the nadir port of the Prichal module at 08:57:43 UTC, just 3 hours, 10 minutes and 28 seconds after launch. The crew entered the station at 09:28 UTC.

Crew

References

Illustrations

Worked examples

Example 1 — a first encounter with Soyuz MS-27

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

In research: Soyuz MS-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 MS-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 MS-27 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2025 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-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 MS-27 in 20 minutes

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

Frequently asked questions

What is Soyuz MS-27 in simple terms?

Why does Soyuz MS-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 MS-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 MS-27.