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Download as PDF; Printable version; In other projects ... The book was initially published on January 1, ... stellar evolutions and supernova production would all ...
In stellar astronomy, the Algol paradox is a paradoxical situation when elements of a binary star seem to evolve in discord with the established theories of stellar evolution. [1] A fundamental feature of these theories is that the rate of evolution of stars depends on their mass: The greater the mass, the faster this evolution, and the more ...
Stellar evolution is the process by which a star changes over the course of its lifetime and how it can lead to the creation of a new star. 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 current age of the ...
A dredge-up is any one of several stages in the evolution of some stars.By definition, during a dredge-up, a convection zone extends all the way from the star's surface down to the layers of material that have undergone fusion.
In stellar evolution, an isochrone is a curve on the Hertzsprung-Russell diagram, representing a population of stars of the same age but with different mass. [1] The Hertzsprung-Russell diagram plots a star's luminosity against its temperature, or equivalently, its color. Stars change their positions on the HR diagram throughout their life.
In his 1952 book The Creation of the Universe, Gamow explained Hans Bethe's association with the theory thus: [2] The αβγ paper with the figure referred to in the text. The results of these calculations were first announced in a letter to The Physical Review, April 1, 1948. This was signed Alpher, Bethe, and Gamow, and is often referred to ...
Usually circumstellar envelopes are formed from the dense stellar wind, or they are present before the formation of the star. [1] Circumstellar envelopes of old stars (Mira variables and OH/IR stars) eventually evolve into protoplanetary nebulae, and circumstellar envelopes of young stellar objects evolve into circumstellar discs. [2]
Stellar archaeology is the study of the early history of the universe, based on its early composition. [1] By examining the chemical abundances of the earliest stars in the universe: metal-poor , Population II stars; insights are gained into their earlier, metal-free, Population III progenitors.