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21 Οκτ 2024 · Sun - Evolution, Structure, Radiation: The Sun has been shining for 4.6 billion years. Considerable hydrogen has been converted to helium in the core, where the burning is most rapid. The helium remains there, where it absorbs radiation more readily than hydrogen.
30 Ιαν 2023 · While seemingly eternal, the Sun is a giant ball of burning gas currently 4.5 billion years old that will continue for about 8 billion more before slowly fading away. It was born out of the gas and dust of previous stars, collecting mass until nuclear fusion could ignite, creating the core.
Current theories hold that about 5 billion years ago the Sun began to form from a huge dark cloud of dust and vapor that included the remnants of earlier stars which had exploded. Under the influence of gravity the cloud began to contract and rotate. The contraction rate near the center was greatest, and gradually a dense central core formed.
27 Ιαν 2022 · In a wide expanse of space, gravity drew dust and gas together to create the young solar system. The sun formed first from the vast material, with the planets close behind.
22 Δεκ 2015 · The Sun started as a T Tauri star – a wildly active star that blasted out an intense solar wind. And just a few million years later, it settled down into its current form.
4 ημέρες πριν · The young Sun, just like the young Earth, was very different than it is now. To understand why, we need to know a little bit about how the Sun and other stars give off so much energy. Stars creates all of their light and heat through the process of nuclear fusion.
9 Ιουν 2021 · Read about the history and future of Earth’s sun as well as fun facts about the sun’s age, size, temperature, and phenomena like solar flares.
