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Heat blackened steel, 9ct gold, silver solder, magnet. 60mm ∅
Variable stars are those whose light fluctuates. This is caused by emitted or blocked light.
There are two main types, intrinsic and extrinsic. Intrinsic variable stars emit variable light. This could be caused by the star pulsing in size, or having a sun spot. Extrinsic variable stars have their light blocked periodically by something orbiting it.
Ursae Majoris variables are two stars so close together that they are almost touching.
This brooch is one of a series of ‘cosmic’ brooches exploring star variations.