The main sequence stage occurs after a stellar nebula collapses due to the force of gravity. As the nebula collapses, the internal temperature increases. When the core of the newly-formed protostar reaches a certain temperature, nuclear fusion starts. Nuclear fusion is a nuclear reaction that rele...
After the protostar phase, the life cycle of an average star starts with a yellow dwarf phase. The Sun is an example of a yellow dwarf, also known as a main-sequence star. When a star begins its main sequence life, it is fusing hydrogen to helium within the core. Throughout the life...
Vega is a main sequence star in spectral class A. This means that it is currently in a life phase where it converts hydrogen to helium for fuel and...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your ...
The Life Cycle of Stars “protostar” The Life Cycle of Stars “protostar” “Main Sequence” (longest phase in a star’s cycle. Stars Classifying stars: H-R diagram Vogt-Russell theorem Mass-luminosity relation Evolution on the HR diagram. THE BIG BANG This model suggests that somewhere arou...
A protostar may go through this sequence many times before the accretion disk and surrounding cloud are dispersed. Radiation from the star on to the disk during this intense stage of activity could be partially responsible for volatile depletions in the inner solar system (Bell et al., 2000),...
can begin. This is the process that all stars go through as they convert protons of hydrogen, through several stages, into atoms of helium. This reaction is exothermic; it gives off more heat than it requires, and so the core of a main sequence star releases a tremendous amount of energy...
What happens to turn a protostar into a star? What is the momentum of light? What is a nuclear reactor? Does stars move or not move? What about Polestar what is its specialty? What is the exact mechanism by which an implosion of a dying star becomes an explosion?
arered dwarfstars that experience large fluctuations in surface temperature and solar flux over a course of hours or even minutes. Flare stars are highly unpredictable, but amazing to watch, because most stars, like those on the main sequence, experience variability in their solar output only over...
This diagram called a Hertsprung-Russell or H-R diagram revealed that most of the stars lie along a smooth diagonal curve called the main sequence with hot, luminous stars in the upper left and cool, dim stars in the lower right. Off of the main sequence, there are cool, bright stars ...
The Origin of Episodic Accretion Bursts in the Early Stages of Star Formation We study numerically the evolution of rotating cloud cores, from the collapse of a magnetically supercritical core to the formation of a protostar and the ... EI Vorobyov,S Basu - 《Astrophysical Journal》 被引量: ...