Replace the 20 year old water heater. It's past its life span. They now make more energy effecient water heaters which will lower your utility bill. Put a blanket around the new water heater while you're at it.
A light period is a menstrual cycle that is shorter and/or lighter than a woman's regular period. Women should familiarize themselves with their menstrual cycle, how many pads or tampons they use, and how long their periods last to quickly detect any changes in their periods.
Orbital Period. Orbital period is defined as the amount of time an object travels around another object. This is in respect to the sidereal period, which is the time required for a celestial body to orbit. In the succeeding paragraph, you will find the varying orbital periods and their respective explanations.