astronomy

NGC 6503

NGC 6503 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 NGC 6503 rather than just read about it. In short: NGC 6503 is a field dwarf spiral galaxy in the northern constellation of Draco. It was discovered by German astronomer Arthur von Auwers on July 22, 1854.

Key takeaways

NGC 6503 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect NGC 6503 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 6503 from memory before moving on to harder problems.

Reference excerpt

NGC 6503 is a field dwarf spiral galaxy in the northern constellation of Draco. It was discovered by German astronomer Arthur von Auwers on July 22, 1854. The galaxy has an angular size of 7.1′ × 2.4′ and an apparent visual magnitude of 10.2. It is located at the distance of 18 million light years away from the Milky Way galaxy. NGC 6503 may form the remote tip of a long chain of galaxies that extends out into the Local Void, forming a galaxy filament spanning 26 million light-years (8 Mpc). The galactic plane of this galaxy is inclined at an angle of 78°±3° to the plane of the sky, with the major axis of its oval profile being aligned along a position angle of 121°. The morphological classification of NGC 6503 is SAB:(s)bc. This indicates a barred spiral galaxy (SAB:) with no inner ring structure (s) and moderately wound spiral arms (bc). However, the ':' notation indicates some uncertainty about the classification. Older works gave it a class of SA(s)bc; i.e. no bar. A possible bar system has been reported via infrared observations, being viewed end-on from the perspective of the Earth. Ultraviolet observations show a young, inner star forming ring encircling the bar. The ring has a radius between 1 and 2.5 kpc from the core. There is a disk of neutral hydrogen that is larger in extent than the optical disk of the galaxy. This extra-planar gas is mostly the result of star formation activity, rather than cold gas that is being accreted. There is evidence for a LINER-type or Seyfert 2 nucleus. NGC 6503 has one known satellite galaxy, known as KK 242. With a stellar mass of about 3 million solar masses, KK 242 is on the border between a dwarf irregular galaxy (dIrr) and a dwarf spheroidal galaxy (dSph).

Gallery

References

Illustrations

Worked examples

Example 1 — a first encounter with NGC 6503

Start with the simplest possible case. Write down what NGC 6503 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 NGC 6503 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 NGC 6503 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 NGC 6503

In research: NGC 6503 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 NGC 6503 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: NGC 6503 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Draco (constellation), Dwarf spiral galaxies, Field galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 6503 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 NGC 6503 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 6503 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 NGC 6503 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 6503 in simple terms?

NGC 6503 is a field dwarf spiral galaxy in the northern constellation of Draco. It was discovered by German astronomer Arthur von Auwers on July 22, 1854.

Why does NGC 6503 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 NGC 6503?

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 NGC 6503.