astronomy

WASP-79b

WASP-79b 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-79b rather than just read about it. In short: WASP-79b, also known as Pollera, is an extrasolar planet orbiting the star WASP-79 (Montuno). This planet is in the constellation Eridanus, and is about 780 light-years from Earth.

Key takeaways

WASP-79b 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-79b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of WASP-79b from memory before moving on to harder problems.

Reference excerpt

WASP-79b, also known as Pollera, is an extrasolar planet orbiting the star WASP-79 (Montuno). This planet is in the constellation Eridanus, and is about 780 light-years from Earth. The name, Pollera, was selected in the NameExoWorlds campaign by Panama, during the 100th anniversary of the IAU. A pollera is the traditional costume the woman wears in the "El Punto", a Panamanian dance.

Host star WASP-79, or CD-30 1812, is a F-type dwarf star located at 240 parsecs (780 light-years) away from Earth. With 1.26 M☉ and 1.73 R☉, it is both larger and more massive than the Sun. Its effective temperature is 6,365 K, making it hotter than the Sun. The star WASP-79 is named Montuno. Montuno is the traditional costume the man wears in the "El Punto", a Panamanian dance.

Characteristics WASP-79b is a very large hot Jupiter that is among the largest exoplanets discovered although its size is uncertain. The discovery paper estimated it to be 2.09 ± 0.14 RJ (approximately 300,000 kilometers across) with a temperature of 1,900 ± 50 K, but modern studies give a lower radius of 1.756±0.031 RJ and a temperature of 1,747±27 K. The planet is orbiting the host star at nearly polar orbit with respect to star's equatorial plane, inclination being equal to −95.2+0.9−1.0°. In 2019 and 2020, the transmission spectra of WASP-79b were taken utilizing HST and Spitzer Space Telescope, with best fit being the hazy atmosphere containing about 1% water and traces of iron(I) hydride. The presence of iron hydride was confirmed in 2021, along with tentative detection of vanadium oxide. Also, in 2022 an atmospheric sodium has been detected.

Illustrations

Worked examples

Example 1 — a first encounter with WASP-79b

Start with the simplest possible case. Write down what WASP-79b 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-79b 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-79b 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-79b

In research: WASP-79b 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-79b 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-79b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Eridanus (constellation), Exoplanets discovered by WASP, Exoplanets discovered in 2012, so understanding it makes those chapters shorter.
In everyday life: Look for WASP-79b 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-79b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WASP-79b 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-79b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WASP-79b in simple terms?

WASP-79b, also known as Pollera, is an extrasolar planet orbiting the star WASP-79 (Montuno). This planet is in the constellation Eridanus, and is about 780 light-years from Earth.

Why does WASP-79b 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-79b?

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-79b.