mercury it was pluto but pluto has been considered as a "dwarf planet"
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The biggest planet in the solar system is Jupiter, while the smallest planet is Mercury. Jupiter is the largest planet by both mass and volume, while Mercury is the smallest and closest planet to the Sun.
The smallest planet in our solar system is Mercury, while the farthest planet from the Sun is Neptune.
The smallest planet in our solar system 5 years ago was Mercury. Mercury is the smallest planet and the closest to the Sun in our solar system.
None of these. Mars is the second smallest planet in the solar system.
The coldest planet in our solar system is Neptune. The smallest planet in our solar system is Mercury.