@aliciafeng

tars and Galaxies: Pillars of the Universe's Beauty Stars and galaxies are essential elements that make up our universe. Stars are giant balls of gas that shine due to nuclear fusion reactions in their cores, where hydrogen is converted into helium, producing energy that emits light. The closest example is the Sun, which serves as the source of life on Earth. Stars come in various types, ranging from small red dwarfs to massive, extremely hot blue giants. At the end of their life cycle, stars can transform into nebulas, neutron stars, or black holes, depending on their mass. Each star is part of a larger system, namely galaxies.

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