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What is the complete life cycle of a star from birth to death. How do they evolve. Learn the different stages step by step in detail with simple images.
Stellar evolution is not studied by observing the life of a single star, as most stellar changes occur too slowly to be detected, even over many centuries. Instead, astrophysicists come to understand how stars evolve by observing numerous stars at various points in their lifetime, and by simulating stellar structure using computer models .
Life Cycle of a Star. Credit: NASA. Nuclear reactions at the centre (or core) of a star provides energy which makes it shine brightly. This stage is called the ' main sequence '. The exact lifetime of a star depends very much on its size. Very massive stars use up their fuel quickly.
Stars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements. Every star has its own life cycle, ranging from a few million to trillions of years, and its properties change as it ages.
Groups of stars make up galaxies, while planets and ultimately life arise around stars. Although stars have been the main topic of astronomy for thousands of years, we have begun to understand them in detail only in recent times through the advent of powerful telescopes and computers.
These and planetary nebulae from low-mass stars are the sources of many of the elements we find on Earth. Their dust and gas will one day become a part of other stars, starting the whole process over again. That’s a very brief summary of the lives, times, and deaths of stars.
Learn about and revise the life cycle of stars, main sequence stars and supernovae with GCSE Bitesize Physics.
Learn more about the life cycle of stars from NASA.
A Star Is Born. All stars begin their lives in dense interstellar clouds of gas and dust. Even before they become stars, though, much of their future life and structure is determined by the way they form. A star is defined by nuclear fusion in its core.
What stages of life do stars go through? Watch the birth of stars in “stellar nurseries” and their transformation into red giants and supergiants. Find out what causes supernovae, how black holes form, and what happens to stars after they die.