astronomy

José Costas Gual

José Costas Gual is a astronomy 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 José Costas Gual rather than just read about it. In short: José Costas Gual (19 January 1918 – 9 July 2011) was a Spanish amateur astronomer. Biography José Costas Gual founded the group Pro Divulgación Astronómicä (PDA) on 24 September 1936, in the municipality of San Celoni, a province of Barcelona.

Key takeaways

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

Reference excerpt

José Costas Gual (19 January 1918 – 9 July 2011) was a Spanish amateur astronomer.

Biography José Costas Gual founded the group Pro Divulgación Astronómicä (PDA) on 24 September 1936, in the municipality of San Celoni, a province of Barcelona. All the observations made by José Costas after that date have filled the "Diarios" of the PDA to date, including activities, observations, or thoughts related to astronomy. They contain more than 72 years of astronomical history, in more than 25 volumes, which are currently in the process of being digitized and published on his official page. Costas had a brief but intense relationship with the Spanish astronomer José Comas y Solá, until the death of Comas in December 1937. After 1959, Costas dedicated himself to polishing mirrors for small reflecting telescopes, of which more than 3500 were built, an activity which won him great popularity in Spain.

Illustrations

Worked examples

Example 1 — a first encounter with José Costas Gual

Start with the simplest possible case. Write down what José Costas Gual claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 José Costas Gual 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 José Costas Gual 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 José Costas Gual

In research: José Costas Gual appears in astronomy 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 José Costas Gual 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: José Costas Gual is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1918 births, 2011 deaths, 20th-century Spanish astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for José Costas Gual 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 José Costas Gual in 20 minutes

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

Frequently asked questions

What is José Costas Gual in simple terms?

José Costas Gual (19 January 1918 – 9 July 2011) was a Spanish amateur astronomer. Biography José Costas Gual founded the group Pro Divulgación Astronómicä (PDA) on 24 September 1936, in the municipality of San Celoni, a province of Barcelona.

Why does José Costas Gual matter?

Because it connects several astronomy 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 José Costas Gual?

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 José Costas Gual.