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Which planet is the smallest in the Solar System?
It is the closest planet to the Solar System, with a diameter just over one-third that of Earth.
Smallest Planet
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Articles about Smallest Planet
4 published items.
Space science
As the smallest planet in the Solar System, Mercury was once as big as Earth
Mercury, only 1/3 the size of Earth, is currently the smallest planet in the Solar System, but in the past, Mercury and Earth were the same size, until an incident occur…
Space science
Uncover the mysteries of Mercury
Mercury is the smallest planet in the solar system and is always a mystery to humans. However, recent images provided by Messenger spacecraft have helped scientists unco…
Space science
NASA discovered the smallest planet in the universe
The newly discovered planet, named Kepler-37b, is only slightly larger than the Moon and takes 13 days to complete an orbit around its star.