ranjan

The Sun and Planets formed together about 1.6 billion years back from a cloud of gas and dust called Solar Nebula.A shock wave  from a nearby explosion probably initiated initiated the collapse of Solar Nebula. The Sun formed in the center and Planets formed in a thin disk orbiting around it. Similarly, Moon formed orbiting the gas giant  P lanets. Comets condensed in outer solar system with many of them thrown out to great distances by close gravitational encounters with giant planets.      A Planet is a celestial body (object pertaining to sky beyond Earth's atmosphere pertaining to spiritual or invisible heaven. Located in Orbit around Sun, containing enough mass for its self- gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium ( almost round type) shape, and cleared neighborhood around its orbit.Hydrostatic is a branch of physics dealing with characteristics of fliuds at rest with the pressure or exerted in a fluid on an immersed body compare hydr