@holvek: The evolution of the Sun is a 10-to-12-billion-year life cycle that is currently in its stable main-sequence stage as a yellow dwarf star. Born 4.6 billion years ago from a giant cloud of gas and dust, the Sun has spent its life fusing hydrogen into helium in its core. This steady thermonuclear reaction keeps the star balanced and will continue to provide Earth with light and heat for about another 5 billion years. In about 5 billion years, the Sun will run out of hydrogen fuel in its core and expand into a Red Giant. As the core contracts and heats up, the outer layers of the star will swell dramatically and cool down, causing its brightness to increase thousands of times. During this expansion, the Sun will engulf Mercury and Venus, and will likely completely scorch or destroy Earth. The finale of the Sun's life will be peaceful, as it sheds its outer layers into space to leave behind a cooling White Dwarf. The ejected gas will form a beautiful planetary nebula, while the star's super-dense core, roughly the size of Earth, will remain at the center. Lacking any new energy sources, this stellar remnant will slowly fade into the darkness of space over trillions of years. #redgiant #sun #scary #solarsystem

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Friday 02 October 2026 08:19:54 GMT