what is the smallest planet in our solar system

The smallest planet in our solar system is Mercury. It is the smallest of the eight planets in terms of radius, volume, and mass. Mercury has a radius of about 2,440 km, which is just over a third of Earth's radius. Its volume and mass are also the smallest among the planets, with its mass being just under 1/18th that of Earth. Mercury is even closer in size to Earth's Moon than to Earth itself. Pluto used to be considered the smallest planet, but it was reclassified as a dwarf planet in 2006, leaving Mercury as the smallest official planet in the solar system. Mercury's diameter is about 4,879 km, while Pluto's is about 2,302 km, making Mercury significantly larger than Pluto but still the smallest true planet. Mercury is also the closest planet to the Sun and has extreme surface temperatures due to its lack of atmosphere. In summary, Mercury is the smallest planet in our solar system both by size and mass.