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Reveal Universe on Instagram: "The video shows two stars in a binary system moving closer over time. As they interact, their outer layers mix and their combined mass increases. When the merged star reaches a critical mass, internal conditions change rapidly, leading to a supernova event. This releases energy and spreads stellar material into surrounding space. After this event, the remaining gas and dust expand outward and gradually cool. Over time, this material forms a nebula remnant, which co