Saturday 22 September 2012

Evening Sky Map

Evening Sky Map

Before using even the most basic of sky maps it’s important to understand how we pinpoint the positions of stars in the sky.  As the Earth spins on it’s axis, all stars appear fixed in place in relation to each other and move together across the night sky from east to west.  Picture the Earth at the center of a huge imaginary celestial sphere. With all the stars visible on its inside surface, this sphere’s Celestial North is marked by the North Star, Polaris. Therefore, when reading star charts always remember that Celestial North is not up but towards Polaris. we then transfer the familiar coordinate system of latitude and longitude used on the Earth’s surface onto this star globe, we have a celestial grid system that mimics its terrestrial counterpart.  In the sky,  “latitude” is called <em>declination</em> while the “longitude”

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

Evening Sky Map

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