NGC 256 (also known as ESO 29-SC11) is open cluster in the Tucana constellation. It was discovered by John Frederick William Herschel on April 11, 1834.
References
External links Media related to NGC 256 at Wikimedia Commons
astronomy
NGC 256 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 256 rather than just read about it. In short: NGC 256 (also known as ESO 29-SC11) is open cluster in the Tucana constellation. It was discovered by John Frederick William Herschel on April 11, 1834.

NGC 256 (also known as ESO 29-SC11) is open cluster in the Tucana constellation. It was discovered by John Frederick William Herschel on April 11, 1834.
References
External links Media related to NGC 256 at Wikimedia Commons

Start with the simplest possible case. Write down what NGC 256 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.
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 256 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.
Typical questions about NGC 256 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.
NGC 256 (also known as ESO 29-SC11) is open cluster in the Tucana constellation. It was discovered by John Frederick William Herschel on April 11, 1834.
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.
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.
It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on NGC 256.