Although it is thin, it absorbs radiation that the sun gives off, shielding the layers of the atmosphere underneath. The exosphere is the outermost layer of the Earth’s atmosphere. James G. Speight, in Natural Water Remediation, 2020. 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. 2.5 The exosphere. 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 happens at half the distance to the Moon [the average distance between Earth and … This layer has very few atmospheric molecules, which can escape into space. Earth's atmosphere has a series of layers, each with its own specific traits. The exosphere is the upper part of Earth's atmosphere. Moving upward from ground level, these layers are named the troposphere, stratosphere, mesosphere, thermosphere and exosphere. Some scientists disagree that the exosphere is a part of the atmosphere and instead classify it actually as a part of outer space. The exosphere is the uppermost layer of Earth’s atmosphere, and is point at which the atmosphere becomes thin and merges with interplanetary space. 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. it is 10,000 km from earth. This unit provides an easy way to quickly compare planets' distances from the Sun. 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. 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 Moon orbits about 250,000 miles above the Earth, while the exosphere only extends up about 100 miles. The exosphere goes from about 400 miles (640 km) high to about 800 miles (1,280 km). 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. The exosphere is found on the very boundaries of Earth's atmosphere. •Exosphere: The exosphere is the outermost layer of the Earth's atmosphere. Troposphere. The exosphere gradually fades away into the realm of interplanetary space. The exosphere is the uppermost layer of Earth’s atmosphere and marks a transitional zone between the atmosphere’s lower layers and interplanetary space. It starts at about 500 km and gradually extends into the vacuum of outer space at about 190,000 km. 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