astronomy

TOI-2136 b

TOI-2136 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 TOI-2136 b rather than just read about it. In short: TOI-2136 b is a sub-Neptune exoplanet orbiting the nearby red dwarf star TOI-2136. It was discovered in 2022 through transit observations by NASA's TESS and independently validated using ground-based photometry and radial velocity measurements.

Key takeaways

TOI-2136 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 TOI-2136 b to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of TOI-2136 b from memory before moving on to harder problems.

Reference excerpt

TOI-2136 b is a sub-Neptune exoplanet orbiting the nearby red dwarf star TOI-2136. It was discovered in 2022 through transit observations by NASA's TESS and independently validated using ground-based photometry and radial velocity measurements. The planet has an orbital period of approximately 7.85 days and lies at a distance of about 108 light-years from Earth. TOI-2136 b is known for its position near the red dwarf for planets predicted by atmospheric mass-loss models and for its potential as a hycean world.

Discovery TOI-2136 b was first identified as the candidate TOI-2136.01 from photometric data collected during TESS's primary mission. The transit signal was detected with an orbital period of 7.85 days around the red dwarf star TOI-2136. Independent confirmation came from Gan et al. (2022) who used ground-based multi-wavelength photometry, high-angular-resolution imaging, and precise radial-velocity measurements from the CFHT/SPIRou instrument to validate the planet and measure its mass. Kawauchi et al. (2022) validated it using TESS data, ground-based photometry, and radial velocities from the Subaru Telescope's IRD instrument, while also conducting a search for helium in its atmosphere and Beard et al. (2022) provided additional validation using the Habitable-Zone Planet Finder (HPF) on the Hobby-Eberly Telescope, placing an upper mass limit.

Characteristics The mass–radius combination of TOI-2136 b is compatible with a wide range of interior compositions, from water or ice dominated worlds to gas-enveloped rocky cores. Interior structure models suggest it may retain a small H/He envelope (mass fraction ~1–2%) atop a rocky or icy core. It lies relatively close to the red dwarfs, where thermally driven atmospheric escape is expected to sculpt planetary populations. TOI-2136 b has also been discussed as a potential Cold Haber World, where microbial life could produce detectable ammonia via a process similar to the Haber process under high-pressure ocean conditions and could be a future target for JWST.

See also Sub-Neptune Hycean planet Red dwarf Transiting Exoplanet Survey Satellite List of exoplanets discovered in 2022

References

Worked examples

Example 1 — a first encounter with TOI-2136 b

Start with the simplest possible case. Write down what TOI-2136 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 TOI-2136 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 TOI-2136 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 TOI-2136 b

In research: TOI-2136 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 TOI-2136 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: TOI-2136 b is common in secondary-school and first-year university syllabi. It links to neighbouring topics Exoplanets discovered in 2022, Super-Earths, Transiting exoplanets, so understanding it makes those chapters shorter.
In everyday life: Look for TOI-2136 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study TOI-2136 b in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what TOI-2136 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 TOI-2136 b out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is TOI-2136 b in simple terms?

Why does TOI-2136 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 TOI-2136 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 TOI-2136 b.