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Nebulas are clouds of gas and dust from "summary" of The Secret World of Stargazing by Adrian West
Nebulas, those mysterious entities that dot the night sky, are often described as "clouds of gas and dust." But what does this actually mean? Well, imagine a vast cloud floating in space, not made of water vapor like the clouds we see here on Earth, but instead composed of tiny particles of gas and dust. These particles can be anything from hydrogen and helium to heavier elements like carbon and oxygen. These nebulous clouds are not uniform in composition; instead, they are a chaotic mix of different elements, swirling and mixing together in a delicate dance. The gas in these nebulae is typically ionized, meaning that its atoms have lost or gained electrons, giving them a positive or negative charge. This ionization often occurs due to the intense radiation from nearby stars, which strip away the electrons from the gas atoms. The...
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