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The Hidden Lives of Galaxies - Directional Chart

Directional Chart

Below are three orientations of a star field: as it appears to the naked eye; as it appears in the finderscope (upside down and backwards); and as it appears in most telescopes with a star diagonal (mirror image). Newtonian Reflectors will not have the mirror image effect. The arrows show the directions that stars appear to drift, moving east to west, across the field of view.

Naked Eye
Most Telescopes without star diagonal
Most Telescopes
with star diagonal


A service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/GSFC

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