Non-circular Objects
Many deep sky objects such as galaxies and nebulas are non-circular and are thus typically given two measures of diameter: Major Diameter and Minor Diameter. For example, the Small Magellanic Cloud has a visual apparent diameter of 5° 20′ × 3° 5′.
Read more about this topic: Angular Diameter
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“Culture relates to objects and is a phenomenon of the world; entertainment relates to people and is a phenomenon of life.”
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