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The night sky is the hemisphere of the sky which is pointed away from the Sun. I note that the Eath orbits the Sun. It takes one year to orbit around the sun. So today one hemisphere of the sky will pointed toward the Sun, and it will be imposible to see stars in the daylight in that hemisphere, while the opposite hemisphere of the sky will be pointed away ...


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The way the star chart is drawn, the points labeled 1 and 3 are on the celestial equator, the 0 degree declination reference. The tip-off is that a line between them passes through Orion, the top-right star in Orion's belt, which is very close to the celestial equator. (Orion is the constellation labeled B.) North is, therefore, the point labeled 2. The ...


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First determine the North (South) direction by drawing a line from the center through Polaris (Sigma Octantis). The other principal directions follow from that. You need to obtain the coordinates of a well-recognized star in equatorial coordinates (right ascension and declination), not too near the celestial pole. Given your chart, it's no problem as it ...


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You should definitely checkout "astronomy-bundle" https://www.npmjs.com/package/astronomy-bundle This library covers most of the important astronomical calculations and has a great documentations.


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