Diurnal


In space and astronautical engineering, diurnal refers to the daily cycle of light and dark periods on a celestial body, such as a planet or moon. The length of a diurnal cycle is determined by the rotation period of the celestial body. For example, on Earth, the diurnal cycle is approximately 24 hours long, while on Mars it is approximately 24.6 hours long. Understanding the diurnal cycle of a celestial body is important for designing and operating spacecraft and rovers, as well as for planning scientific observations and experiments. It can also have implications for the habitability of a planet or moon, as the availability of sunlight and darkness can affect the temperature and other environmental conditions.


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