science

SDSSJ0946+1006

SDSSJ0946+1006 is a science 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 SDSSJ0946+1006 rather than just read about it. In short: SDSSJ0946+1006 is an unusual gravitational lens system consisting of three galaxies at distances of respectively three, six, and eleven billion light years from Earth. In a report presented at the 211th meeting of the American Astronomical Society, researchers Raphael Gavazzi and Tommaso Treu of the University of California, Santa Barbara described the discovery of a double Einstein ring produced by the gravitationa…

Key takeaways

SDSSJ0946+1006 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect SDSSJ0946+1006 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SDSSJ0946+1006 from memory before moving on to harder problems.

Reference excerpt

SDSSJ0946+1006 is an unusual gravitational lens system consisting of three galaxies at distances of respectively three, six, and eleven billion light years from Earth. In a report presented at the 211th meeting of the American Astronomical Society, researchers Raphael Gavazzi and Tommaso Treu of the University of California, Santa Barbara described the discovery of a double Einstein ring produced by the gravitational lensing of light from two distant galaxies. The observations were made using the Hubble Space Telescope. The main lens lies at redshift z = 0.222, with the inner ring at z = 0.609 with an Einstein radius RE = 1.43±0.01" and magnitude m = 19.784±0.006, the outer ring is at z ≲ 6.9 with RE = 2.07±0.02" and magnitude m = 23.68±0.09 The lensing galaxy is also known as SDSSJ0946+1006 L1, with the nearer lensed galaxy as SDSSJ0946+1006 S1, and the farther lensed galaxy SDSSJ0946+1006 S2.

References

External links HubbleSite Hubble Finds Double Einstein Ring January 10, 2008 10:00 AM (EST)

Illustrations

Worked examples

Example 1 — a first encounter with SDSSJ0946+1006

Start with the simplest possible case. Write down what SDSSJ0946+1006 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 SDSSJ0946+1006 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 SDSSJ0946+1006 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 SDSSJ0946+1006

In research: SDSSJ0946+1006 appears in science 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 SDSSJ0946+1006 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: SDSSJ0946+1006 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gravitational lensing, SDSS objects, so understanding it makes those chapters shorter.
In everyday life: Look for SDSSJ0946+1006 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 SDSSJ0946+1006 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SDSSJ0946+1006 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 SDSSJ0946+1006 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SDSSJ0946+1006 in simple terms?

Why does SDSSJ0946+1006 matter?

Because it connects several science 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 SDSSJ0946+1006?

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 SDSSJ0946+1006.