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Imagine Home | Teachers' Corner | Life Cycles of Stars (Grades 9-12) - Index ... I. Star Birth and Life ... Hey, Low Mass Star... This is Your Life! 6...
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imagine.gsfc.nasa.gov/docs/teachers/lifecycles/LC_index...
imagine.gsfc.nasa.gov/docs/teachers/lifecycles/LC_index.html
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It will take a star millions to billions of years to reach this stage. All stars go through 3 main stages: nebula, protostar, and main sequence star. Life Cycle of a Low Mass Star; A small, cool star uses up its hydrogen more slowly than the larger stars.
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schoolscience.rice.edu/science/curricula/PrintPreviewLe...
schoolscience.rice.edu/science/curricula/PrintPreviewLearningExperienceOnly.cfm?LEID=2030&CurriculaID=317
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evolution of a low-mass star on HR diagram ... The rate of energy generated by the triple-alpha process is even more sensitive to temperature than that of the CNO cycle: ... This helium-burning phase of the star's life lasts quite a long time. Not as long as the hydrogen-burning main-sequence phase, for two reasons: first,
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spiff.rit.edu/classes/phys230/lectures/planneb/planneb....
spiff.rit.edu/classes/phys230/lectures/planneb/planneb.html
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The Life Cycle of a Star ... High mass stars die much more dramatically, in violent explosions. In contrast to a low mass star, a high mass star has enough mass to continually increase the pressure and temperature of its core, which causes a chain of nuclear reactions involving heavier and heavier elements.
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www.ioncmaste.ca/homepage/resources/web_resources/CSA_A...
www.ioncmaste.ca/homepage/resources/web_resources/CSA_Astro9/files/html/module2/lessons/lesson2/starLifecycle.html
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The Life and Death of Stars ... After a low mass star like the Sun exhausts the supply of hydrogen in its core, there is no longer any source ... Massive stars burn brighter and perish more dramatically than most. When a star ten times more massive than Sun exhaust the helium in the core, the nuclear burning cycle continues.
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map.gsfc.nasa.gov/universe/rel_stars.html
map.gsfc.nasa.gov/universe/rel_stars.html
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After a helium-burning red giant runs out of helium fuel in its core, the star's core starts to collapse and heat up. This causes the outer layers of the star to expand and cool, similar to the ... The figure above was obtained from the Universe:Origins and Evolution Homepage. Back to the Stellar Life Cycle Flow Chart...
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cse.ssl.berkeley.edu/bmendez/ay10/2000/cycle/supergiant...
cse.ssl.berkeley.edu/bmendez/ay10/2000/cycle/supergiant.html
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The mass of the star is more or less equal to that of our sun, while it collapses to a size of aproximately the Earth, so the star turns into a much smaller compact sphere. It now is a white dwarf, its mass is very dense, matter of a few grams on Earth weighs on a white dwarf several tonnes.
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library.thinkquest.org/18188/english/universe/stars/sta...
library.thinkquest.org/18188/english/universe/stars/starlife.htm
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sorry, but your browser is not frames capable; ... mouse over the subjects above to see a description of each; ... celestial (star) news...
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library.thinkquest.org/25763/mindex.htm
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In the HR diagram, total brightness (known as "Luminosity" or "Absolute Magnitude") is plotted against the surface temperature of the star. As the star goes through its life cycle, it moves along the HR diagram from one place ... So depending on its mass, a star ends its life either in a planetary nebula or supernova,
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curious.astro.cornell.edu/question.php?number=38
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