EARTH
It is the only habitable planet in solar system.
The radius of the earth is 6 371 km kilometers.
Mass of the earth is 5.972 x 10^24 kilograms.
Density of the earth is 5.51 g/cm³.
Gravity of the earth is 9.807 m/s².
Earth contains 70.8 % surface with water and remaining 29.2 % surface is land. Earth has a dynamic atmosphere. There are mainly 7 layers of it which are Troposphere ( 0-10 km ), Startosphere ( 10-30 km ), Mesosphere ( 30-50 km ), Thermosphere and Ionosphere ( 50-400 km ), Exosphere ( 400-500 km ), Magnetosphere ( >500 km ). It is the densest planet in the Solar System. Sun light takes nearly 8 minutes and 20 seconds to reach earth from sun.
One earth day is about 23 hours and 56 minutes and one earth year is 365.25 days. Average surface temperatue of the earth is 14.76 °C.Earth is rounded into an ellipsoid with a circumference of about 40,000 km.
