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Planet Mercury is the planet that is located nearest to the sun. The distance of planet Mercury from the sun is only 57.9 million kilometers. It is then followed by Venus and Earth as the next planets near the sun. 
The planet nearest to the sun is Mercury.
Were you wondering which of the planets is closest to the Sun? The answer is planet Mercury. At an average distance of only 57.9 million km, Mercury orbits closer to the Sun than any other planet. Just to give you a comparison, Venus orbits the Sun at an average distance of 108.2 million km. And Earth orbits the Sun at an average distance of 149.6 million km. So you can see that Mercury is much closer, taking only 88 days to complete an orbit around the Sun.
the nearest is the mercury