9/11/2023 0 Comments Blue planet deep sea orbThe sun is a huge ball of hydrogen (72%) and helium (28%) gases. Solar energy drives the climate and weather systems of our planet. Our sun is the source of energy for life. However, particles of the atmosphere are found 1,000 miles (1,600 km.) in space above the planet's surface. More than 99% of earth's atmosphere is less than 50 miles (80 km.) high. Ozone filters out most of the sun's harmful ultraviolet radiation. The stratosphere, or outer layer, stretches 11-30 miles above sea level and contains ozone (O3). It contains most of the planet's air, which consists of nitrogen (78%) and oxygen (21%). 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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