Which is the smallest planet in our solar system?

By BYJU'S Exam Prep

Updated on: September 15th, 2023

(a) Mercury

(b) Earth

(c) Mars

(d) Venus

The smallest planet in our solar system is Mercury. The order of planets from the sun- Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.

Smallest Planet in our Solar System

  • The smallest planet in our solar system is Mercury.  Mercury is our solar system’s smallest planet with a primary radius of 2440 KM.
  • The quickest of all the planets in the Solar System, Mercury completes its orbit of the Sun in 87.97 Earth days. The stony planet Mercury is also referred to as a terrestrial planet. The surface of Mercury is solid and cratered, much like the moon of Earth.
  • It ceases when the solar system stabilised into its current configuration around 4.5 billion years ago, making Earth the third planet from the sun. Gravity caused spinning gas and dust to become the third planet from the sun, which is how our earth was created. The Hydrosphere, which includes lakes, rivers, and other freshwater bodies, makes up 71% of Earth’s surface, earning it the nickname “blue planet.”
  • The second-smallest planet in our solar system, Mars is the fourth planet from the sun. Its iron-rich environment gives it a weathered red colour, hence the name “red planet.” The gravity on Mars is 38% that of Earth. Mars is a pleasant 80 degrees Fahrenheit, but its poles are far colder.
  • The second planet from the sun is Venus. Despite being further from the Sun than Mercury, Venus is hotter than Mercury. After the moon, Venus is the second-brightest natural object in the night sky. The atmospheric pressure on Venus is 90 times that on Earth.


Which is the smallest planet in our solar system? (a) Mercury (b) Earth (c) Mars (d) Venus

Mercury is the smallest planet in our solar system. Venus, Mercury, Earth, Jupiter, Mars, Saturn, Neptune, Uranus are the other planets. Mercury is the planet with the least mass and volume. When it comes to planetary formation, the Solar System’s planets provide a nice variety.

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