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Clear Sky Charts (called clocks until February 29, 2008) are web graphics which deliver weather forecasts designed specifically for astronomers. They forecast the cloud cover , transparency and astronomical seeing , parameters which are not forecast by civil or aviation forecasts. [ 1 ]
Durham (/ ˈ d ɜːr ə m / DURR-əm) is a town in Middlesex County, Connecticut, United States. Durham is a former farming village on the Coginchaug River in central Connecticut. The town is part of the Lower Connecticut River Valley Planning Region. The population was 7,152 at the 2020 census. [2]
Sky conditions are estimated in terms of how many eighths of the sky are covered in cloud, ranging from 0 oktas (completely clear sky) through to 8 oktas (completely overcast). In addition, in the SYNOP code there is an extra cloud cover indicator '9' indicating that the sky is totally obscured (i.e. hidden from view), usually due to dense fog ...
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Durham is a census-designated place (CDP) comprising the primary village and surrounding development in the town of Durham, Middlesex County, Connecticut, United States. It is in the central and northeastern portions of the town, bordered to the north by the town of Middlefield and the city of Middletown .
Durham University Observatory: 1839 Durham, UK Dyer Observatory: 1953 Brentwood, Tennessee, US Effelsberg 100-m Radio Telescope: 1972 Bonn, Germany Ege University Observatory: 1965 Kemalpaşa, İzmir, Turkey Einstein Probe: 2024 Low Earth orbit: Einstein Observatory (defunct) 1978 Low Earth orbit: Elginfield Observatory: 1969 Middlesex Centre ...
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A celestial map by the Dutch cartographer Frederik de Wit, 1670. A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations, stars, nebulae, galaxies, and planets. [1] They have been used for human navigation since time immemorial. [2]