Its inner layer is called the troposphere and reaches only 11 miles above sea level. The atmosphere is a thin, gaseous layer of air that envelops the planet. Temperatures of - 128° F (-89° C) have been recorded at Vostok station in Antarctica. The highest temperatures on Earth have reached 136° F (58° C) at Al Asisiyah, Libya. Water covers approximately 139,500,000 square miles, or 71% of the total surface area. Approximately 57,300,000 square miles, or 29% of the total surface area is land. Earth's axis is tilted at a 23.5° angle.Įarth has a total surface area of 196,800,000 square miles. It makes one full revolution around the sun every 365 days, 6 hours, 9 minutes, and 9.45 seconds. The planet rotates once every 23 hours, 56 minutes, and 4.09 seconds. It is estimated to be over 4.5 billion years old.
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