8,000 miles (13,000 km)
Length of day

24 hours
Length of year

365.25 Earth days
Distance from Sun

93 million miles (150 million km)

1 (Earth=1)

1 (Earth=1)
Planet type

Number of moons

Surface temperature

-129 to 134 °F (-89 to 57 °C)
Core temperature

10,000 °F (5,500 °C)

Earth, circling the Sun at an average distance of 93 million miles, is the fifth-largest
planet and the third from the Sun. It orbits the Sun at a speed of 67,000 mph, making
one revolution in 365 days, 5 hours, 48 minutes, and 45.51 seconds. Earth
completes one rotation on its axis every 23 hours, 56 minutes, and 4.09 seconds.
Actually a bit pear-shaped rather than a true sphere, Earth has a diameter of 7,927
mi at the equator and a few miles less at the poles. It has an estimated mass of
about 6.6 sextillion tons, with an average density of 5.52 grams per cubic centimeter.
Earth's surface area encompasses 196,949,970 sq mi of which about three-fourths
is water.