astronomy

XMMXCS 2215−1738

XMMXCS 2215−1738 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 XMMXCS 2215−1738 rather than just read about it. In short: XMMXCS 2215−1738 is a galaxy cluster that lies 10 billion light-years away and has a redshift value of z=1.45. It was discovered by the XMM Cluster Survey in 2006.

Key takeaways

XMMXCS 2215−1738 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect XMMXCS 2215−1738 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of XMMXCS 2215−1738 from memory before moving on to harder problems.

Reference excerpt

XMMXCS 2215−1738 is a galaxy cluster that lies 10 billion light-years away and has a redshift value of z=1.45. It was discovered by the XMM Cluster Survey in 2006. Discovered in 2006, XMMXCS 2215−1738 is one of the most distant galaxy clusters known. It is embedded in intergalactic gas that has a temperature of 10 million degrees. The estimated mass of the cluster is 500 trillion solar masses, most coming from dark matter. The cluster was discovered and studied using the XMM-Newton and Keck Telescopes. The cluster is surprisingly large and evolved for a cluster that existed when the universe was only 3 billion years old. Led by University of Sussex researchers, part of the XMM Cluster Survey (XCS) used X-ray Multi Mirror (XMM) Newton satellite to find it, Keck Telescope to determine distance, and used the Hubble Space Telescope to further image it.

It contains hundreds of reddish galaxies surrounded by x-ray-emitting gas. The galaxy is called XMMXCS 2215−1734 in many references, with some news sources listing both names. The source of the naming contradiction between XMMXCS 2215−1734 and XMMXCS 2215−1738 is not known. However, XMMXCS 2215−1738 seems to be the more accurate.

See also 2XMM J083026+524133 galaxy cluster XMM-Newton XMM Cluster Survey List of the most distant astronomical objects

References Most Distant Galaxy Cluster Found 10 Billion light-years Away XMM Cluster Survey (XCS) The XMM Cluster Survey: A Massive Galaxy Cluster at z=1.45 S. A. Stanford (arXiv preprint) Sun, 4 Jun 2006 16:23:55 GMT

External links Astronomers Find Most Distant Galaxy Cluster Yet (SpaceDaily) Jun 7, 2006 Maturity of Farthest Galaxy Cluster Surprises Astronomers Christine L. Kulyk (SPACE.com) 8 June 2006 06:20 am ET

Worked examples

Example 1 — a first encounter with XMMXCS 2215−1738

Start with the simplest possible case. Write down what XMMXCS 2215−1738 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 XMMXCS 2215−1738 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 XMMXCS 2215−1738 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 XMMXCS 2215−1738

In research: XMMXCS 2215−1738 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 XMMXCS 2215−1738 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: XMMXCS 2215−1738 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aquarius (constellation), Galaxy cluster stubs, Galaxy clusters, so understanding it makes those chapters shorter.
In everyday life: Look for XMMXCS 2215−1738 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 XMMXCS 2215−1738 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what XMMXCS 2215−1738 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 XMMXCS 2215−1738 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is XMMXCS 2215−1738 in simple terms?

XMMXCS 2215−1738 is a galaxy cluster that lies 10 billion light-years away and has a redshift value of z=1.45. It was discovered by the XMM Cluster Survey in 2006.

Why does XMMXCS 2215−1738 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 XMMXCS 2215−1738?

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 XMMXCS 2215−1738.