astronomy

WASP-80

WASP-80 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 WASP-80 rather than just read about it. In short: WASP-80 is a K-type main-sequence star about 162 light-years away from Earth. The star's age is much younger than the Sun's at 1.352±0.222 billion years.

Key takeaways

WASP-80 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect WASP-80 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of WASP-80 from memory before moving on to harder problems.

Reference excerpt

WASP-80 is a K-type main-sequence star about 162 light-years away from Earth. The star's age is much younger than the Sun's at 1.352±0.222 billion years. WASP-80 could be similar to the Sun in concentration of heavy elements, although this measurement is highly uncertain. The star was named Petra in 2019 by Jordanian amateur astronomers as part of the NameExoWorlds contest. Three multiplicity surveys in 2015-2018 did not detect any stellar companions to WASP-80, but a survey in 2020 detected a 0.07M☉ companion candidate at an angular separation 2.132±0.010 arcseconds, with a false alarm probability of 3%.

Planetary system In 2013 a transiting hot Jupiter planet WASP-80 b was detected on a tight, circular orbit. The planet was named Wadirum by Jordanian astronomers in December 2019. Its equilibrium temperature is 825±19 K, while measured temperature of the dayside is 937±48 K and temperature of the nightside is 851±14 K. This temperature difference indicates a rather low planetary albedo and weak global transport of heat. Measurement of the Rossiter–McLaughlin effect in 2015 revealed WASP-80b's is orbit is well-aligned with the equatorial plane of the star, with orbital obliquity equal to 14±14°. Although one transmission spectrum of the planetary atmosphere showed signs of ionised potassium, another measurement in 2017 yielded a gray and featureless spectrum, probably due to a high cloud deck or haze in the atmosphere of WASP-80b. Evidence for water vapour and methane molecules (CH4) were found for the planet through observations of JWST. This discovery helped uncovers the origin and evolution of the planet.

References

Worked examples

Example 1 — a first encounter with WASP-80

Start with the simplest possible case. Write down what WASP-80 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 WASP-80 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 WASP-80 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 WASP-80

In research: WASP-80 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 WASP-80 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: WASP-80 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aquila (constellation), K-type main-sequence stars, Planetary systems with one confirmed planet, so understanding it makes those chapters shorter.
In everyday life: Look for WASP-80 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 WASP-80 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WASP-80 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 WASP-80 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WASP-80 in simple terms?

WASP-80 is a K-type main-sequence star about 162 light-years away from Earth. The star's age is much younger than the Sun's at 1.352±0.222 billion years.

Why does WASP-80 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 WASP-80?

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 WASP-80.