Tareas

Hello teacher and classmates today I will present my oral exam and I will talk about the stars

In general, a star is all astronomical object that shines, while in a more technical and precisearguably is a plasma sphere that holds its shape through a hydrostatic equilibrium of forces. The balance essentially occurs between the force of gravity, which pushes the material towards the center of thestar, and the pressure of the plasma out that, as occurs in a gas tends to expand. The outwards pressure is temperature dependent, which in a typical case such as the sun is maintained with theenergy produced inside the star. This balance will remain essentially the same as far as the star keep pace with energy production. However, as explained below, this rate of change over time, causingvariations in the star's overall physical properties that make the evolution of the star.

Formation and evolution of the

Stars form in the densest regions of molecular clouds due to gravitationalinstabilities caused mainly by supernovae or galactic collisions. The process is accelerated once these clouds of molecular hydrogen (H2) start falling over themselves, fueled by increasingly intensegravitational pull. Its density increases gradually, the process being faster in the center than at the periphery. Does not take long to form a nucleus called hot contracting protostar. The collapse of thiscore is finally stopped when they begin nuclear reactions that raise the pressure and temperature of the protostars stars
  Other star is binary A binary star is a star system consisting of two starsorbiting each other around a common center of mass. Recent studies suggest that a high percentage of stars are part of systems of at least two stars. Multiple systems, which may be ternary,quaternary, or even five or more stars interacting with each other, usually receive also the name of binary stars, as in the case of A and B Centauri and Proximal Centauri.

     Thanks for your attention...