astronomy

NGC 2835

NGC 2835 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 2835 rather than just read about it. In short: NGC 2835 is an intermediate spiral galaxy located in the constellation Hydra. It is located at a distance of circa 35 million light years from Earth, which, given its apparent dimensions, means that NGC 2835 is about 65,000 light years across.

Key takeaways

NGC 2835 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 2835 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of NGC 2835 from memory before moving on to harder problems.

Reference excerpt

NGC 2835 is an intermediate spiral galaxy located in the constellation Hydra. It is located at a distance of circa 35 million light years from Earth, which, given its apparent dimensions, means that NGC 2835 is about 65,000 light years across. It was discovered by German astronomer Wilhelm Tempel on April 13, 1884. NGC 2835 is located only 18.5 degrees from the galactic plane. NGC 2835 is seen nearly face-on. The galaxy features four or five spiral arms, visible in near infrared due to their population II stars. The spiral arms have also numerous HII regions and stellar associations, the larger of which are 5 arcseconds across. Although the galaxy is quite symmetric, the northern arms have HII regions that appear brighter than the southern ones. Also the southern arms appear less developed in their outer parts than the north ones. The star formation rate in NGC 2835 is 1.3 M☉ per year. The total stellar mass of the galaxy is 1010 M☉. In the centre of NGC 2835 lies a supermassive black hole whose mass is estimated to be 3-10 million (106.72±0.3) M☉, based on the spiral arm pitch angle.

NGC 2835 group NGC 2835 is the foremost galaxy in a small group of galaxies, the NGC 2835 group (also known as LGG 172). Other galaxies identified as members of the cluster are ESO 497-035 and ESO 565-001. A bit farther away, at projected separation of 2.2 degrees, lies NGC 2784 and its small galaxy group.

Image gallery

See also NGC 5068 - another low mass spiral galaxy List of NGC objects (2001–3000)

References

External links Media related to NGC 2835 at Wikimedia Commons NGC 2835 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

Illustrations

Worked examples

Example 1 — a first encounter with NGC 2835

Start with the simplest possible case. Write down what NGC 2835 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 2835 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 2835 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 2835

In research: NGC 2835 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 2835 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 2835 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical objects discovered in 1884, Discoveries by Wilhelm Tempel, ESO objects, so understanding it makes those chapters shorter.
In everyday life: Look for NGC 2835 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 2835 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what NGC 2835 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 2835 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is NGC 2835 in simple terms?

Why does NGC 2835 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 2835?

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 2835.