astronomy

WASP-94

WASP-94 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-94 rather than just read about it. In short: WASP-94 is a binary star system located about 690 light-years (210 parsecs) away in the constellation Microscopium. It consists of two F-type stars separated by 15″, corresponding to a projected separation of 2700 au.

Key takeaways

WASP-94 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-94 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of WASP-94 from memory before moving on to harder problems.

Reference excerpt

WASP-94 is a binary star system located about 690 light-years (210 parsecs) away in the constellation Microscopium. It consists of two F-type stars separated by 15″, corresponding to a projected separation of 2700 au. Both stars are known to host exoplanets. The binary system was first observed by John Herschel in 1834 and catalogued as HJ 5234. The designation WASP-94 comes from the Wide Angle Search for Planets, and has been used since the system was found to host planets in 2014. While the two stars have similar spectral types, they differ in elemental abundance – WASP-94A has fewer volatile elements and more refractory elements than WASP-94B.

Planetary system The two stars host a single known planet each. Both are hot Jupiters, gas giant planets completing orbits around their stars in just a few days.

WASP-94Ab transits its host star, and it has also been detected by the radial velocity method. As a result, both its size and mass are known, which show that it is a low-density planet with a highly inflated radius. It has an equilibrium temperature of 1508±75 K. Its orbit is retrograde and misaligned with the rotation of its host star. The atmosphere of WASP-94Ab appears to be relatively free of clouds, with sodium, water vapor and carbon dioxide being detected. WASP-94Bb is a non-transiting planet that has been detected only by radial velocity, so it has no measured radius and true mass. Its minimum mass is 62% the mass of Jupiter.

See also Other systems with multiple planet-hosting stars:

55 Cancri HD 20781 & HD 20782 HD 133131 XO-2 Struve 2398

References

Worked examples

Example 1 — a first encounter with WASP-94

Start with the simplest possible case. Write down what WASP-94 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-94 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-94 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-94

In research: WASP-94 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-94 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-94 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1834, Binary stars, Discoveries by John Herschel, so understanding it makes those chapters shorter.
In everyday life: Look for WASP-94 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-94 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WASP-94 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-94 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WASP-94 in simple terms?

Why does WASP-94 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-94?

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-94.