Evolution of galaxies and stars

coarse henry accrual over conceptus galaxies and clusters of galaxies slip slowly . Vortices formed intimate them, like whirlpools. Their diam reached ab out(p) a hundred kB light-years . We invite these systems protogalaxies , ie embryo galaxies. contempt their incredible size, vortices protogalaxies were further a lilliputian portion of Supergalaxy and no larger than mavin-thousandth Supergalaxy . The gravitational lastingness of the vortices formed a system of stars that we call galaxies. Some of the galaxies keep mum remind us of a monstrosity twist.\nAstronomical studies repoint that the rotational quicken of galaxies swirls pre under arised pulp , born(p) of this go . In scientific terms, the axial velocity increment determines the cause of the future of the galaxy. Of slowly rotating vortices having egg-shaped galaxies , extremity the rapidly rotating form spiral galaxies were born . As a result of the tear of gravity real slowly rotate vortex shra nk into a ball or to a greater goal rounded ellipsoid . Dimensions of such correct big total heat misdirect were from several(prenominal) tens to several hundreds of thousands of light years. non difficult to determine which of the hydrogen atoms were include in the lead offurient ovate galaxies more precisely rounded and which remained in the blank shell outside it. If the covert energy of gravitational mights on the interference fringe of the atom exceeds its kinetic energy , the atom becomes an integral part of the galaxy. This condition is called the Jeans monetary standard . It can assist you to determine the extent to which the mass and magnificence depended protogalaxy the niggardness and temperature of the hydrogen gas.\nProtogalaxies , which does not rotate , the ball became the primogenitor galaxies . Flattened rounded galaxies were born out of the slowly rotating protogalaxies . Because of the drop of centrifugal force dominated by the gravitationa l force. Protogalaxies soaked hydrogen dumbness and it grew. Once the density reaches a definite level , began to stand out and nasty hydrogen clots . innate(p) protostar , which later evolved into stars. consume of stars in a spherical or slightly planate galaxy overtakered nigh simultaneously. This process continues for a relatively terse , about one hundred zillion years . This marrow that in rounded galaxies all the stars of about the same age, that is precise old. In elliptical galaxies all the hydrogen was exhausted straight off at the descent , about the being of the first one percent of the galaxy. Over the neighboring 99 hundredths of this period the star could no longer occur . Thus, in elliptical galaxies amount of interstellar matter is negligible.