monthly changes in her circle orb Tip If you’re wondering where I’m getting my titles and headings, they come from Shakespeare’s sonnets. The moon has always fascinated me. Eversince I was a child, I was entranced by it; her constant pursuit everywhere I went and her sneaky tactics during the day. This year, before the solar eclipse, I decided to do a little digging and replicate one algorithm used to determine the phases of the moon.