10. How does a star's life begin
Be sure you find out where Young got this information ... just so you cite it correctly and don't get nailed for plagiarism!
it begins as a cloud of dust and gas A pro star is formed when gravity causes the dust and gas of a nebula to clump together in a process called accretion if a critical temperature in the protostar is reached then nuclear fusion begins and a star is born
its a short answer
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lmao what are you even talking about NCA, FFS LOL.
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ik i look up from google
To understand how a star's life begins, we need to delve into astrophysics and the process of stellar formation. Here's a simplified explanation:
1. Stellar Nursery: Stars usually form in vast interstellar clouds of gas and dust, known as molecular clouds or stellar nurseries. These clouds consist of hydrogen, helium, and trace amounts of other elements.
2. Gravitational Collapse: Due to the force of gravity, pockets within a molecular cloud start to contract under their own weight. This contraction is triggered by external factors such as shockwaves from supernovae or the gravitational influence of nearby stars.
3. Protostar Formation: As the pocket collapses, it forms a dense and hot core called a protostar. It continues to accumulate mass as more material falls into it. The protostar is surrounded by a rotating disk of gas and dust called an accretion disk.
4. Nuclear Fusion: The protostar's core becomes denser and hotter over time. Eventually, the temperature and pressure in the core reach a critical point where nuclear fusion can occur. Nuclear fusion is the process in which hydrogen atoms fuse together to form helium, releasing an enormous amount of energy in the process. This energy counteracts the inward pull of gravity, maintaining the stability of the star.
5. Main Sequence Star: Once nuclear fusion begins, the protostar becomes a main sequence star. A main sequence star is a stable state where the energy produced by nuclear fusion in its core is balanced by the gravitational forces pulling inward. The star will remain in this phase for the majority of its life.
It's important to note that the specifics of stellar formation can vary depending on the mass of the star. Low-mass stars, like red dwarfs, follow a slightly different path compared to high-mass stars, like blue giants. Nevertheless, the general concept of gravitational collapse followed by nuclear fusion remains consistent throughout stellar formation.
If you're interested in studying this topic further, you can explore books, articles, or online resources on astrophysics or stellar evolution. These resources will provide more detailed and comprehensive explanations with the latest scientific discoveries and theories.