astronomy

Tenma

Tenma 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 Tenma rather than just read about it. In short: Tenma, known as ASTRO-B before launch, was a Japanese X-ray astronomy satellite developed by the Institute of Space and Astronautical Science. It was launched on 20 February 1983, using a M-3S rocket on the M-3S-3 mission.

Key takeaways

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

Reference excerpt

Tenma, known as ASTRO-B before launch, was a Japanese X-ray astronomy satellite developed by the Institute of Space and Astronautical Science. It was launched on 20 February 1983, using a M-3S rocket on the M-3S-3 mission. It was the second X-ray observatory successfully operated by Japan after Hakucho (CORSA-B), and it had a superior temporal and spectral sensitivity compared to its predecessor. Battery failure in July 1984 caused the operation to become limited, and continuing problems lead to the termination of X-ray observation on 11 November 1985, however it remained in sporadic contact until 17 December 1988. It reentered the atmosphere on 19 January 1989.

Highlights Discovery of the iron helium-like emission from the galactic ridge. Iron line discovery and/or study in many LMXRB, HMXRB and AGN. Discovery of an absorption line at 4 keV in the X1636-536 Burst spectra.

References

Notes

Citations

External links

Tenma at ISAS Tenma at NASA Archived 2017-04-01 at the Wayback Machine

Illustrations

Worked examples

Example 1 — a first encounter with Tenma

Start with the simplest possible case. Write down what Tenma 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 Tenma 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 Tenma 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 Tenma

In research: Tenma 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 Tenma 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: Tenma is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1983 in spaceflight, Asian spacecraft stubs, Satellites formerly orbiting Earth, so understanding it makes those chapters shorter.
In everyday life: Look for Tenma 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 Tenma in 20 minutes

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

Frequently asked questions

What is Tenma in simple terms?

Why does Tenma 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 Tenma?

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 Tenma.