Mercury is the innermost of the eight planets in the Solar System. It is also the smallest, and its orbit has the highest eccentricity of the eight.[a] It orbits the Sun once every 87.969 Earth days, completing three rotations about its axis for every two orbits. Mercury has the smallest axial tilt of the Solar System planets. The perihelion of Mercury's orbit precesses around the Sun at an excess of 43 arcseconds per century, a phenomenon that was explained in the 20th century by Albert Einstein's General Theory of Relativity
Mercury (symbol ☿) is the smallest planets of the solar and the closest to the sun
عطارد (رمزه☿) هو أصغر كواكبالمجموعة الشمسية وأقربها إلى الشمس
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