What is the smallest planet?

Related questions

• What effect does Earth’s gravitational force have on objects of different masses?
• What solar system is Pluto in?
• Which planet in our solar system is most earth like?
• What is the closest planet to the sun?
• Why are the planets closest to the sun rocky?
• Why is earth closest to the sun in January?
• Why is Mars closest to the Earth in August?
• What is accretion, and how did it form the Earth?
• How does accretion explain planet formation?
• How does accretion form planets?