Final answer:
A star is a luminous ball of plasma formed from clouds of dust and gas in space. Nuclear fusion at the core generates energy and light for the star to shine.
Step-by-step explanation:
A star is a luminous ball of plasma. Plasma is a state of matter that consists of charged particles, such as electrons and ions. Stars are formed from clouds of dust and gas in space, called nebulae. As these clouds collapse under gravity, the temperature and pressure at the core increase, causing nuclear fusion to occur, which generates the immense energy and light that make stars shine.
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