The lower boundary of the exosphere is called the critical level of escape, where atmospheric pressure is very low (the gas atoms are very widely spaced) and the temperature is very low. This layer has very few atmospheric molecules, which can escape into space. This happens at half the distance to the Moon [the average distance between Earth and … Moving upward from ground level, these layers are named the troposphere, stratosphere, mesosphere, thermosphere and exosphere. This unit provides an easy way to quickly compare planets' distances from the Sun. The exosphere is the outermost layer of the atmosphere (that is, it is the upper limit of the atmosphere) and extends from the exobase, which is located at the top of the thermosphere. James G. Speight, in Natural Water Remediation, 2020. Earth's atmosphere has a series of layers, each with its own specific traits. The exosphere is the outermost layer of the Earth’s atmosphere. The Moon orbits about 250,000 miles above the Earth, while the exosphere only extends up about 100 miles. Theoretically, the Exosphere extends out to around 190,000 km (120,00 miles) from the surface of the earth, which is about halfway to the moon. The exosphere is the outermost layer of Earth's atmosphere. Extending from the top of the thermosphere to 6,200 miles (10,000 km) above Earth is the exosphere, where weather satellites are. The upper boundary of the exosphere can be defined as the distance at which the influence of solar radiation pressure on atomic hydrogen exceeds that of Earth's gravitational pull. Troposphere. The exosphere is the uppermost layer of Earth’s atmosphere and marks a transitional zone between the atmosphere’s lower layers and interplanetary space. The exosphere is found on the very boundaries of Earth's atmosphere. •Exosphere: The exosphere is the outermost layer of the Earth's atmosphere. it is 10,000 km from earth. 2.5 The exosphere. The Earth’s exosphere begins about 500 km (300 miles) above the terrestrial surface and extends out through the magnetosphere and beyond to the interplanetary medium. At its closest point of orbit, the Moon is 363,300 kilometres (225,700 miles) from Earth, while at its furthest point it is over 384,400 kilometres (238,900 miles) away. This outer layer of the atmosphere is approximately 6,200 miles thick and contains gases such as helium and hydrogen, as well as traces of carbon dioxide and oxygen. From an average distance of 93 million miles (150 million kilometers), Earth is exactly one astronomical unit away from the Sun because one astronomical unit (abbreviated as AU), is the distance from the Sun to Earth. It starts at an altitude of about 500 km and goes out to about 10,000 km. The exosphere is the upper part of Earth's atmosphere. The exosphere is the uppermost layer of Earth’s atmosphere, and is point at which the atmosphere becomes thin and merges with interplanetary space. 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