BLACK HOLE is one of the today’s most mysterious object  in universe but astronomer claim they know about it’s formation very well.

In cosmos ,  gravity is responsible for forming black hole and it need very heavy  mass agreater  than 3.1  solar  mass (if we  neglect all other forces) many star have required mass , but during their end life cycle they  lose mass become less then required mass .

In life cycle of  star , star  convert  hydrogen to  helium and helium to beryllium and continue  it (nuclear fusion ) this process release heavy  amount  of energy  which fight and balance with heavy  crushing  force of  gravity due  to  mass . as time  pass star cool  and expand , because fusion of heavy nucleus produce less energy than lighter one .  when heavy amount  of iron form in core , gravity  win  the battle  because fusion of iron consume energy.

Collapsing STAGE:

                         Gravity  domains in star ,now  star starts collapsing  due to it’s own (gravity) mass

STAGE-1

          Gravity force particle to come closer  ,  electron come back to nucleus (as nucleus earlier ionized )and certain amount  of energy release as gravity only  able to work in center and round it ,most  of the  mass of  star  diffuse in space , star  become  white dwarf.

STAGE -2

        If star still  have  enough  gravity to overcome resistive force of interparticle  repulsion . the collapse  continue gravity start  forcing electron towards  nucleus result in formation of  neutron  and release of   photon ( star started shine brighter ) neuron – neutron repulsion is one of the  most   resistive  force , when there is no space left for neutron they suddenly form most rigid body in  universe . due to this sudden  change from fluid to rigid body a shockwave arises  which flew  and  take most of the  remaining  mass  forming  a NEUTRON STAR.

STAGE – 3

        If gravity of neutron star still have enough  force to overcome  neutron  star still  have enough force  to overcome neutron –  neutron repulsion , no force now resist the collapsing  gravity force , once  object  crosses the swarschild radius  it become black hole.

ALL  of  the above stage happen in  few minutes .

now your black hole is ready  let’s  play some tricks to it  in next  blog.