science

SpaceX CRS-18

SpaceX CRS-18 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 SpaceX CRS-18 rather than just read about it. In short: SpaceX CRS-18, also known as SpX-18, was SpaceX's 18th flight to the International Space Station under the Commercial Resupply Services program for NASA. It was launched on 25 July 2019 aboard a Falcon 9 rocket.

Key takeaways

SpaceX CRS-18 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect SpaceX CRS-18 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SpaceX CRS-18 from memory before moving on to harder problems.

Reference excerpt

SpaceX CRS-18, also known as SpX-18, was SpaceX's 18th flight to the International Space Station under the Commercial Resupply Services program for NASA. It was launched on 25 July 2019 aboard a Falcon 9 rocket. The same Dragon capsule has previously flown to the ISS in April 2015 and December 2017. This was the first time a capsule was used for a third flight.

Primary payload In February 2016, it was announced that NASA had awarded a contract extension to SpaceX for five CRS additional missions (CRS-16 to CRS-20). NASA has contracted for the CRS-18 mission from SpaceX and therefore determines the primary payload, date/time of launch, and orbital parameters for the Dragon space capsule. It carried the third International Docking Adapter (IDA-3). The following is a breakdown of cargo bound for the ISS:

Science investigations: 1,192 kg (2,628 lb) Crew supplies: 233 kg (514 lb) Vehicle hardware: 157 kg (346 lb) Spacewalk equipment: 157 kg (346 lb) Computer resources: 17 kg (37 lb) External payloads: IDA-3 534 kg (1,177 lb) The Dragon spacecraft also featured a handful of ceramic heat shield tiles, meant to flight-test a critical component of the SpaceX Starship spacecraft.

Gallery

See also Uncrewed spaceflights to the International Space Station

References

External links NASA SpaceX official page for the Dragon spacecraft

Illustrations

Worked examples

Example 1 — a first encounter with SpaceX CRS-18

Start with the simplest possible case. Write down what SpaceX CRS-18 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 SpaceX CRS-18 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 SpaceX CRS-18 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 SpaceX CRS-18

In research: SpaceX CRS-18 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 SpaceX CRS-18 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: SpaceX CRS-18 is common in secondary-school and first-year university syllabi. It links to neighbouring topics SpaceX Dragon 1, SpaceX payloads contracted by NASA, Spacecraft launched by Falcon 9 Block 5 rockets, so understanding it makes those chapters shorter.
In everyday life: Look for SpaceX CRS-18 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 SpaceX CRS-18 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SpaceX CRS-18 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 SpaceX CRS-18 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SpaceX CRS-18 in simple terms?

Why does SpaceX CRS-18 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 SpaceX CRS-18?

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 SpaceX CRS-18.