The Mars Global Surveyor carried several different instruments. On board was one called the Thermal Emission Spectrometer. It used measures the heat given off by Mars in the form of infrared light. This tool allows scientists to understand the surface geology and the atmosphere. Here, the TES image shows the type and density of clouds in the atmosphere of Mars.

The Mars Global Surveyor carried several different instruments. On board was one called the Thermal Emission Spectrometer. It used measures the heat given off by Mars in the form of infrared light. This tool allows scientists to understand the surface geology and the atmosphere. Here, the TES image shows the type and density of clouds in the atmosphere of Mars.

The Mars Global Surveyor carried several different instruments. On board was one called the Thermal Emission Spectrometer. It used measures the heat given off by Mars in the form of infrared light. This tool allows scientists to understand the surface geology and the atmosphere. Here, the TES image shows the type and density of clouds in the atmosphere of Mars.

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