Stellar evolution is the process by which a star changes over the course of time. When the stars go out. The life span of a star . a few seconds ago. At this point, it leaves the main sequence. 8th grade. Massive stars have a mass 3x times that of the Sun. Remnant or pre-planetary nebula. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe.The table shows the lifetimes of stars as a function of their masses. A nebula is a large cloud of gas and dust. Life Cycle of a Star and HR Diagram DRAFT. 0% average accuracy. Heavy stars turn into supernovae, neutron stars and black holes whereas average stars like the sun end life as a white dwarf surrounded by a disappearing planetary nebula. They follow a pattern similar to many of the life cycles we see here on earth. First, the star is born from a nebula. The spectral class of four stars are shown in comparison with a Hertzsprung-Russell diagram. The contracting cloud is then called a protostar. Edit. Prev NEXT . Save. Massive Stars - The Life of a Star of about 10 Solar Masses. Based on the information, which star is most like the sun? The word life span is different from the life cycle. A protostar is the earliest stage Eriksen et al. Gravity can pull some of the gas and dust in a nebula together. This cycle begins with birth, expands through a lifespan characterized by change and growth, and ultimately leads to death. Red giant Supernova/Blackhole/Neutron star/White dwarf. 0. lomsmgarcia. The life cycle of the star in stages . A star's mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust in which it is born. Some are 50x that of the Sun. Science. Life Cycle of a Giant Star. This is the remnant of the supernova Tycho Brahe observed in 1572. Over time, this process of compaction creates a spherically-shaped central cloud, orbited by the gas on the fringes, creating what is called an accretion disk. The Life Cycles of Stars A star's life cycle is determined by its mass. The image is a colorized composite of low-energy x-rays (red) showing debris and high-energy x-rays (blue) showing the blast wave, plus the visible field of stars around it. Life Cycle of a Star — A STAR IS BORN - Worksheet Name: STAGES COMMON TO ALL STARS All stars start as a nebula. A star begins as a cloud of interstellar gas, mostly made of hydrogen.Eventually, small density differentials begin the cloud begin to create gravity wells, pulling other particles closer and condensing them. Eventually, a main sequence star burns through the hydrogen in its core, reaching the end of its life cycle. Stars go through a natural cycle, much like any living beings. The time frame in the life cycle of stars is entirely different from the life cycle of … Edit. 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