astronomy

Gliese 623

Gliese 623 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 Gliese 623 rather than just read about it. In short: Gliese 623 is a dim binary star 26.09 light-years (7.99 parsecs) from Earth in the constellation Hercules. It was photographed by the NASA/ESA Hubble Space Telescope's Faint Object Camera in 1994.

Key takeaways

Gliese 623 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Gliese 623 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Gliese 623 from memory before moving on to harder problems.

Reference excerpt

Gliese 623 is a dim binary star 26.09 light-years (7.99 parsecs) from Earth in the constellation Hercules. It was photographed by the NASA/ESA Hubble Space Telescope's Faint Object Camera in 1994. The binary system consists of two red dwarfs orbiting each other at a distance of 1.9 astronomical units.

See also List of star systems within 25–30 light-years

Notes

References

External links Nasa page Archived 2010-06-09 at the Wayback Machine

Illustrations

Worked examples

Example 1 — a first encounter with Gliese 623

Start with the simplest possible case. Write down what Gliese 623 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 Gliese 623 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 Gliese 623 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 Gliese 623

In research: Gliese 623 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 Gliese 623 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: Gliese 623 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Binary stars, Gliese and GJ objects, Hercules (constellation), so understanding it makes those chapters shorter.
In everyday life: Look for Gliese 623 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 Gliese 623 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Gliese 623 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 Gliese 623 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Gliese 623 in simple terms?

Gliese 623 is a dim binary star 26.09 light-years (7.99 parsecs) from Earth in the constellation Hercules. It was photographed by the NASA/ESA Hubble Space Telescope's Faint Object Camera in 1994.

Why does Gliese 623 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 Gliese 623?

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 Gliese 623.