Atmosphere of Earth (see the temperature section, below). Because the general pattern of the temperature/altitude profile is constant and measurable by means of instrumented balloon soundings, the temperature behavior provides a useful metric to distinguish atmospheric layers. In this way, Earth's atmosphere can be divided (called atmospheric stratification) into five main layers. Excluding the exosphere, the atmosphere has four primary layers, which are the troposphere, stratosphere, mesosphere, and thermosphere. From highest to lowest, the five main layers are: The exosphere is the outermost layer of Earth's atmosphere (i.e. the upper limit of the atmosphere). It extends from the exobase, which is located at
A Planet Called Utopia him land. He promised to stay out of trouble, be responsible, and not make waves. Above all, stay out of the newspaper headlines. If he has to convene press conferences, they should be scripted, and he should not say anything off the cuff, or vaguely likely to make a disturbance. But one step off the spaceship and onto the tarmac, he does the unthinkable, and the government is suddenly plunged into damage control mode before it's too late. A Planet Called Utopia A Planet Called Utopia is a science fiction novel by Scottish writer J. T. McIntosh, first published in