Earth is the third planet from the Sun. It is the largest of the terrestrial planets in the Solar System in diameter, mass and density. It is also referred to as the Earth, Planet Earth, the World, and Terra. Home to millions of species, including humans, Earth is the only place in the universe where life is known to exist. Scientific evidence indicates that the planet formed 4.54 billion years ago, and life appeared on its surface within a billion years. Since then, Earth's biosphere has significantly altered the atmosphere and other abiotic conditions on the planet, enabling the proliferation of aerobic organisms as well as the formation of the ozone layer which, together with Earth's magnetic field, blocks harmful radiation, permitting life on land.
Adjective:- Terrestrial, Terrain, Telluric, Tellurian, Earthly
Age:- 4,550 million years
Mass:- 5.976 x 10 kg
Volume:- 1.083 x 10 litres
Mean Density:- 5.518 kg/lt
Total Surface Area:- 510 million sq.km
Land Area:- 29.2% of the total surface area
Water Area:- 70.8% of the total surface area
Equatorial Diameter:- 12,755 km
Polar Diameter:- 12,712 km
Escape Velocity:- 11.2 km/sec
Highest Land Point:- Mount Everest (8,852 m)
Lowest Land Point:- Dead Sea (396 m)
Greatest Ocean Depth:- Mariana Trench (11,033m)
Equatorial Circumference:- 40,076 km
Polar Circumference:- 40,024 km
Mean Surface Temperature:- 14C
Maximum distance from sun (Aphelion):- About 152 million km
Minimum distance from sun (Perihelion):- About 147 million km
Rotation Speed”- 23 hrs, 56 min & 40.91 sec
Revolution Speed:- 365 days, 5hrs & 45.51 sec
Dates when days & nights are equal:- Mar, 21 (Vernal Equinox); Sept. 23 (Autumnal Equinox)
Dates of longest days and shortest nights:- June 21 (Summer Solstice); Dec, 22 (Winter Solstice)