the expression ” once in a blue moon” is used as an espression that means infrequently. where does it comes from and what does it have to do with the moon? clearly, many people use the expression and have no idea of its origin. please write an essay on what the expression means relative to the moon:
1. explain what the difference is between the sidereal and synodic cycle?
2. why is the moon sometimes illuminated on the left and sometimes on the right?
3. why cant we see the backside of the moon?
4. why doesnt the moon rotate on its axis?
5. does the crime rate rise during the full moon?
6. since you can only have a lunar eclipse when the moon is full, why not every month?
7. since you can only have a solar eclipse when the moon is new, why not every month?
8. if you keep a lunar calendar what is the main problem? how is it resolved?