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A stellar evolutionary model is a mathematical model that can be used to compute the evolutionary phases of a star from its formation until it becomes a remnant. The mass and chemical composition of the star are used as the inputs, and the luminosity and surface temperature are the only constraints.
A series of points on an H–R diagram, calculated in this way, allows us to follow the life changes of a star and hence is called its evolutionary track. Evolutionary Tracks. Let’s now use these ideas to follow the evolution of protostars that are on their way to becoming main-sequence stars.
Learn how stars are born, evolve and die, and how Chandra observes them with X-rays. Explore the interactive stellar evolution diagram, see examples of different types of stars and remnants, and find answers to common questions.
Stars form when a particular type of interstellar cloud, called a molecular cloud, starts collapsing by the effect of its own gravity and breaks up into tens or hundreds of smaller clumps. Owing to the gravitational attraction, each cloud fragment attracts more and more matter from its surroundings (see Figure 1).
Learn how stars of different masses evolve and end their lives with X-ray images and explanations. Explore the stages from protostar to white dwarf, red giant, supernova, and more.
9 lip 2012 · NASA's Jet Propulsion Laboratory, the leading center for robotic exploration of the solar system.
Learn how stars are born, evolve, and die, and how astronomers use the Hertzsprung-Russell diagram to classify them. Explore the X-ray sources of different types of stars and their remnants.
