science

List of space stations

List of space stations 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 List of space stations rather than just read about it. In short: Operational stations As of 2026, two stations are orbiting Earth with life support system in place and fully operational. Past stations These stations have re-entered the atmosphere and disintegrated.

Key takeaways

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

Reference excerpt

Operational stations As of 2026, two stations are orbiting Earth with life support system in place and fully operational.

Past stations These stations have re-entered the atmosphere and disintegrated. The Soviet Union ran two programs simultaneously in the 1970s, both of which were called Salyut publicly. The Long Duration Orbital Station (DOS) program was intended for scientific research into spaceflight whilst the Almaz program was a secret military program that tested space reconnaissance. ‡ = Never crewed

Prototypes These stations are prototypes; they only exist as testing platforms and were never intended to be crewed. OPS 0855 was part of a cancelled Manned Orbiting Laboratory project by the United States, while the Genesis stations were launched privately. The Genesis stations were "retired" when their avionics systems stopped working after two and a half years, yet they remained in orbit as derelict spacecraft as their orbits gradually degraded over the next 18 years. Both Genesis stations re-entered the atmosphere and were destroyed two months apart in mid-2025.

Concepts

Planned and proposed These space stations have been announced by their host entity and are currently in planning, development or production. The launch date listed here may change as more information becomes available.

Cancelled projects

Most of these stations were cancelled due to financial difficulties, or merged into other projects.

Timeline

Size comparison

Illustrations

Worked examples

Example 1 — a first encounter with List of space stations

Start with the simplest possible case. Write down what List of space stations 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 List of space stations 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 List of space stations 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 List of space stations

In research: List of space stations 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 List of space stations 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: List of space stations is common in secondary-school and first-year university syllabi. It links to neighbouring topics Space stations, Spaceflight timelines, so understanding it makes those chapters shorter.
In everyday life: Look for List of space stations 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 List of space stations in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what List of space stations 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 List of space stations out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is List of space stations in simple terms?

Operational stations As of 2026, two stations are orbiting Earth with life support system in place and fully operational. Past stations These stations have re-entered the atmosphere and disintegrated.

Why does List of space stations 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 List of space stations?

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 List of space stations.