Gary Imm

GaryI

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A backyard amateur astrophotographer enjoying retirement with my wife on beautiful Lake Livingston in Onalaska, Texas, about 90 minutes north of Houston.

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The formation and structure of polar ring galaxies (PRGs) are fascinating to me. PRGs are multi-spin galaxies with 2 axes of rotation. The multi-spin is believed to be the result of a galaxy merger, which the host galaxy accretes stars, dust and gas from a nearby companion galaxy. Sometimes these companions are still present, but typically (as in this case) not. The accreted material forms a large perpendicular ring around the host galaxy. Often the host galaxy appears yellow (older stars) and the accreted ring appears blue (recently formed stars). Unlike other merger results, polar ring galaxies are believed to be a relatively stable configuration, in a quasi-equilibrium state.