Answer: (3) Mercury
Our solar system contains eight planets. Every planet revolves at different distances around the sun. In our solar system, the smallest planet is mercury.
Characteristics of Mercury
Listed below are the few features of Mercury
- One day on Mercury takes 59 Earth days.
- Mercury makes a complete orbit around the Sun (a year in Mercury time) in just 88 Earth days.
- Mercury is a rocky planet, also known as a terrestrial planet.
- Mercury’s thin atmosphere, or exosphere, is composed mostly of oxygen (O2), sodium (Na), hydrogen (H2), helium (He), and potassium (K).
- Mercury has no moons.