好汉王二小
幼苗
共回答了17个问题采纳率:88.2% 举报
Actually,are same with the white dwarf stars and the neutron stars,the black hole are formed from the gravitational collapse of stars,usually having a great,massive,core.When stars are getting senile,their thermonuclear reactions have exhausted the central fuel (Hydrogen).Thus,they do not have enough power to undertake the huge weight of their covering.Therefore,the gravitational pull the core of the star begin collapse,until they reform into the star of small mass and high density.The star are created when huge,gigantic; gas clouds bind together due to attractive forces and form a hot core,combined from all the energy of the two gas clouds.This energy produced is so great when it first collides,that a nuclear reaction occurs and the gases within the star start to burn continuously.² The Hydrogen is the dominant gas consumed in a star.The equilibrium achieved the star in order to avoid collapsing at this point.The gravitational pull from the core of the star is equal to the gravitational pull of the gases forming a type of orbit.² however; the star could get into various stages when this equality is destroyed.The stars of small in mass will evolution as the White Dwarf.If the stars are to have a larger mass,then it may possibly be a Supernova.A black hole is one of the last options that a star may take.If the core of a star is so massive (approximately 6-8 solar masses; one solar mass being equal to the sun’s mass) ²then it is most likely that when the star’s gases are almost consumed those gases will collapse inward,forced into the core by the gravitational force laid upon them.
Compare to other wonders in the galaxy,black holes are very mysterious and special,because of their ability to make themselves invisible,thus people are unable to observe them.Even scientists are only able to surmise what their internal structures are.In that way,how do black holes hide themselves?The answer is warped space and time.According to theory,light spread along a straight line,however,the time and space will be bending under the gravitational field.In that area,light still travel between any two points,but the pathway of the light is no longer horizontal,instead it becomes bended.In other word,light want to go in a straight line,yet strong gravitational forces are pulling the light to bend itself from the original direction.
According to the general theory of relativity,the gravitational field will cause cause the space and time to be bended.When the star’s volume is really big,its gravitational field nearly does not influence to the space and time.The light can travel along a straight line in any direction.In contract,the smaller radiuses of the star will suffer huge gravitational.The gravitational pull the light along the curved track returns to the surface of stars.When the star’s radii slight as a characteristic radius (in astronomy is called Schwarzschild radius as a specific value,sometimes historically referred to as the gravitational radius),the vertical superficial launch light will be caught.At this time,the stars become black holes.They are likely the bottomless pits in the universe,once falling into seem no able to escape.The huge gravitational the light unable outward to object,thus has cut off the relation between star and outside.Therefore,the black hole is becoming invisible.³
1年前
5