astronomy

LHS 475 b

LHS 475 b 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 LHS 475 b rather than just read about it. In short: LHS 475 b is a terrestrial exoplanet orbiting the star LHS 475 which is about 40.7 light years away, in the constellation of Octans. It was the first extrasolar planet to be confirmed by the James Webb Space Telescope.

Key takeaways

LHS 475 b belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect LHS 475 b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of LHS 475 b from memory before moving on to harder problems.

Reference excerpt

LHS 475 b is a terrestrial exoplanet orbiting the star LHS 475 which is about 40.7 light years away, in the constellation of Octans. It was the first extrasolar planet to be confirmed by the James Webb Space Telescope. It completes an orbit every 2 days and is 99% the diameter of Earth. It is also one of the most similar-to-Earth exoplanets discovered, in terms of radius.

Physical characteristics LHS 475 b has a radius equivalent to 99% of the Earth's radius and a mass equivalent to 91.4% of the Earth's mass. It completes an orbit around its star in about 2 days and is most likely tidally locked.

Atmosphere It is not yet known whether LHS 475 b has an atmosphere. It is possible that, in fact, it does not, but there are some atmospheric compositions that have not been ruled out, such as an atmosphere made up of 100% carbon dioxide, which is difficult to detect. As it is very hot, with a temperature of 313 °C, if clouds are detected on its surface, this could suggest that LHS 475 b is similar to Venus, which has an atmosphere made up of carbon dioxide surrounded by thick clouds.

Discovery and observation The Transiting Exoplanet Survey Satellite (TESS) telescope indicated the existence of an exoplanet around the star LHS 475 through transit information.

On August 31, 2022, the James Webb Space Telescope's NIRSpec instrument captured the exoplanet with just two transit observations and observed its transmission spectrum. Confirmation of LHS 475 b by the James Webb Space Telescope was published on January 11, 2023.

See also List of exoplanets discovered in 2023 List of terrestrial exoplanet candidates for atmosphere detection

References

Illustrations

Worked examples

Example 1 — a first encounter with LHS 475 b

Start with the simplest possible case. Write down what LHS 475 b 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 LHS 475 b 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 LHS 475 b 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 LHS 475 b

In research: LHS 475 b 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 LHS 475 b 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: LHS 475 b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Discoveries by the James Webb Space Telescope, Exoplanets discovered in 2023, Near-Earth-sized exoplanets, so understanding it makes those chapters shorter.
In everyday life: Look for LHS 475 b 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 LHS 475 b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what LHS 475 b 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 LHS 475 b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is LHS 475 b in simple terms?

Why does LHS 475 b 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 LHS 475 b?

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 LHS 475 b.