Secretofphysics

  The big bang theory is a physics theory which explains the origin of universe . The big bang theory states that the universe began as a hot and infinitely dense point , only a few millimeters wide , it was similar  toa supercharged black hole .About 13.7 billion years ago this tiny violently exploded. And it is from this explosion , the big bang that all matter ,energy, space and time  were created  .The next two stages was  called radiation era and matter era ,which shapes the universe . radiation era named dominance of radiation after big bang . this era is made of smaller stages call epochs occurs in first ten thousands years. the earliest is planck  epoch no matter existed  in this time only energy and ancestor four force  of  nature , at the end of this event a super force  left away the gravity. the inflationary epoch begin in which the universe rapidly expand  . this time universe is pipeing hot and it churned with electron...

     THE SUN:                                                                                     The sun is the star at the center of our solar system. It is heated by nuclear fusion( two nucleus collide two masses of the nuclei tends to form single nuclei which is less in mass then other two masses the remaining mass expressed as energy it is called as nuclear fusion). Sun express this radiation in the form of light ,ultraviolet and infrared. The sun's radius is 695,000 kilometers. the sun contains 73% of hydrogen 25% of helium, small amount of oxygen and carbon ,neon and iron. It is formed    about 4.6 billion years ago ,formed by gravitational collapse of matter which is in molecular cloud . Most of the matter gathered in center , other to orbitin...

Black hole :                                                                                      Black hole is an massive object in the universe. where force of gravity is very strong not even a light or electromagnetic waves cannot escape from it. The boundary of black hole is called as event horizon, which is truly cannot see  . when something crosses the event horizon it collapses into the black hole 's singularity which is the mid point of black hole . In there space time and laws of physics cannot apply. scientists theorized several types of black holes are stellar , super massive ,intermediate, miniature. stellar black holes are formed when massive stars die and collapse . The are roughly 10 to 20 times the mass of our sun. There can be millions of stellar black h...