Book Description
A celestial body moving in a curved circle around a star is known as a planet. The planets of our solar framework are separable in two gatherings: 1. The planets of the inward circle (as they lie between the sun and the belt of space rocks) or the internal planets or the 'terrestrial planets' (which means earth-like as they are comprised of rock and metals, and have moderately high densities) and 2. The planets of the external circle or external planets or the 'gas monster planets' or the Jovian planets – which means Jupiter-like. 3. The inward circle comprises of four planets (Mercury, Venus, Earth and Mars) having more modest and denser bodies while the external circle involves four planets (Jupiter, Saturn, Uranus, and Neptune) having a bigger size and less thick materials and have a thick climate, generally of helium and hydrogen 4. Jovian planets are more similar to the sun than like the terrestrial planets.