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Solar coordinate systems
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<p>In <a href="/facts/Solar_observation/flja2GVm">solar observation</a> and <a href="/facts/Imaging/Lkw7V9M8">imaging</a>, <a href="/facts/Coordinate_system/Mtd0q4SP">coordinate systems</a> are used to identify and communicate locations on and around the <a href="/facts/Sun/CadPCVHh">Sun</a>. The Sun is made of <a href="/facts/Plasma_(physics)/1d3btMVU">plasma</a>, so there are no permanent demarcated points that can be referenced. </p>