astronomy

LHS 475

LHS 475 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 rather than just read about it. In short: LHS 475 is a red dwarf star located 40.7 light-years (12.5 parsecs) away from the Solar System in the constellation of Octans. It hosts one known exoplanet.

Key takeaways

LHS 475 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 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of LHS 475 from memory before moving on to harder problems.

Reference excerpt

LHS 475 is a red dwarf star located 40.7 light-years (12.5 parsecs) away from the Solar System in the constellation of Octans. It hosts one known exoplanet.

Planetary system

The exoplanet LHS 475 b was initially found in transit data from TESS, and its confirmation using the NIRSpec instrument of the James Webb Space Telescope, which also observed its transmission spectrum, was published in January 2023. Another independent confirmation of the planet was published on arXiv in April 2023, and a year later accepted to the Astronomical Journal. The JWST data is consistent with a featureless spectrum, as would be expected of a planet with no atmosphere, but is also consistent with some types of atmosphere, such as a thin carbon dioxide-dominated atmosphere like that of Mars, or an atmosphere obscured by a thick cloud deck such as that of Venus. Other atmospheric compositions, such as a methane-dominated atmosphere, are ruled out by this spectrum. LHS 475 b is close in size to Earth, at 99% its diameter, but is much hotter, with an equilibrium temperature of 586 K (313 °C; 595 °F). Assuming the planet has little to no atmosphere, its dayside temperature is estimated at 748 K (475 °C; 887 °F). The planet completes an orbit around its star in just two days and is likely tidally locked.

Notes

References

Illustrations

Worked examples

Example 1 — a first encounter with LHS 475

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

In research: LHS 475 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 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 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gliese and GJ objects, M-type main-sequence stars, Octans, so understanding it makes those chapters shorter.
In everyday life: Look for LHS 475 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 in 20 minutes

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

Frequently asked questions

What is LHS 475 in simple terms?

LHS 475 is a red dwarf star located 40.7 light-years (12.5 parsecs) away from the Solar System in the constellation of Octans. It hosts one known exoplanet.

Why does LHS 475 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?

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.