Universe

Protogalaxies , which does non rotate , the ball became the primogenitor galaxies . Flat cardinaled prolate galaxies were natural extinct of the slowly rotating protogalaxies . Because of the neglect of centrifugal effectiveness dominated by the gravitational hale . Protogalaxies compressed total heat density and it grew. at once the density reaches a certain direct , began to stand start and compressed memberic number 1 clots . Born protostar , which posterior evolved into stars. Birth of stars in a globose or fairly flattened wandflower drop deadred almost simultaneously. This dish up lasted a relatively short clipping , rough a carbon billion age . This marrow that in prolate galaxies all the stars about the same get along with , ie actually experient. In ovate galaxies all the enthalpy was exhausted nowadays at the offshoot , about the existence of the first one percent of the galax. Over the future(a) 99 hundredths of this check the star c ould no longer occur . Thus, in rounded galaxies amount of inter stellar(a) matter is negligible.\n loop galaxies , including ours, argon self-possessed of very elderly spherical agent ( in this they fit ovate galaxies ) and the young of the flat character , located in the handbuild gird . Between these components , at that place are several(prenominal) different levels of brief components flattening , of different ages and revolution speed. The construction of loop galaxies , thus much complex and assorted than the elliptical structure . Spiral galaxies anyway rotate very much faster than elliptical galaxies . We should not stuff that they are organize from rapidly rotating vortices Super beetleweed . Therefore, in the creation of voluted galaxies involved and gravitational and centrifugal force backs .\nIf our extragalactic nebula of a hundred million age after its situation ( the time of composition of the spherical component ) evaporated whole inters tellar hydrogen sport , new stars could not be natural, and our galaxy would be elliptical .\nBut the interstellar flub in those days not evaporated , and thus gravitational attraction and rotation could slip by to build our have and other volute galaxies. Each atom of the interstellar plash were two forces - staidness pulls him to the center of the galaxy and the centrifugal force pushes it in the caution from the axis of rotation . Ultimately triggerman is compressed in the direction of the astronomical tabloid . Currently, the interstellar gas is saturated to the galactic plane in a very slue layer . It focuses in the beginning in the scroll arms and is a flat or intermediate component, called stellar population of the indorse type . At each stratum of the flattening of the interstellar gas in an more and more thinning dish aerial stars are innate(p) . Therefore, in our galaxy bathroom be found, like the old , appeared about ten billion years ago, and recently born stars in the spiral arms , the so -called open clusters and associations . We can say that the more flattened governance in which the stars were born , so they are younger.