In this session i need to give a glance on gravitational energy.this is the basic force by which we are able to survive on earth with out falling into the huge empty space of the universe.even though the earth rotates  around its own axis @ 1670km/h and revolves around sun  @ 108000km/h  at this high rate of speeds we may thrown away but not because of this gravitational force only.works on this force started with the initiating works of galileogalilei around 16th century AD . After him many scientists like Newton,Einstien,Charlesdarvin.newton proposed the universal gravitational law which gives all the attractional forces between any two objects in the universe.and also darwin did an experiment which shows the attractional force between the two bodies.

through this gravity only all the planets are revolving around the sun and also the satellites around the planets. based on this theory many laws ,principles ,solutions were further done by many physicists like EQUIVALENCE PRINCIPLE,ENERGY WAVE THEORY,
SCALAR -TENSOR THEORY, ASTRO PHYSICS,COSMOLOGY,DARK ENERGY,QUANTUM PHYSICS,etc...related thorey will be published in next posts thanku