In astronomy we deal with distances on a scale you may never have thought about before, with numbers larger than any you may have encountered. We adopt two approaches that make dealing with astronomical numbers a little bit easier. First, we use a system for writing large and small numbers called scientific notation or sometimes powers-of-ten notation. This system is very appealing because it eliminates the many zeros that can seem overwhelming to the reader. The small raised number after the 10, called an exponent , keeps track of the number of places we had to move the decimal point to the left to convert ,, to 5.
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It uses mathematics , physics , and chemistry in order to explain their origin and evolution. Objects of interest include planets , moons , stars , nebulae , galaxies , and comets. Relevant phenomena include supernova explosions, gamma ray bursts , quasars , blazars , pulsars , and cosmic microwave background radiation. More generally, astronomy studies everything that originates outside Earth's atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole.
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We have gathered some helpful guidelines you can use when selecting good topics for astronomy essays. First, let us ask ourselves what astronomy is. This text is meant to guide you through the process of topic selection and highlights sample essay topics you can consider. Take into account the knowledge you have on the subject matter or idea before deriving a topic from it. Doing so helps to avoid problems such as getting stuck during the writing process.