By Mayo Clinic Staff. Dark circles under your eyes generally implies that the darkening is primarily below both eyes. This is different from bruising caused by trauma or redness and swelling caused by infection around only one eye. Causes.
Everything in the solar system is orbiting another space object. The planets, asteroids, comets, kuiper belt objects, Oort cloud, and everything else in the system orbits the â¦sun, Sol; and, Sol and the entire system orbit the center of the Milky Way galaxy.
In the inner Solar System, we find the âInner Planetsâ â Mercury, Venus, Earth, and Mars â which are so named because they orbit closest to the Sun. In addition to their proximity, these planets have a number of key differences that set them apart from planets elsewhere in the Solar System.For starters, the inner planets are rocky and terrestrial, composed mostly of silicates and metals, whereas the outer planets are gas giants.The inner planets are also much more closely spaced than their outer Solar System counterparts.he outer planets, meanwhile, often have dozens of satellites and rings composed of particles of ice and rock. The terrestrial inner planets are composed largely of refractory minerals, such as the silicates, which form their crusts and mantles, and metals such as iron and nickel which form their cores.