Mars Close Approach happens about every 26 months. It is closely related to Mars Opposition and Mars Retrograde. Since Mars and Earth are at their closest, it's generally the best time to go to Mars. Many Mars missions have taken advantage of the close distance to visit the red planet.
At its most basic, switchel is water, cider vinegar, ginger and a sweetener (molasses, honey, sorghum, etc.). Rum, whiskey, brandy or hard cider can be added to give it a bit more oomph. Iâve seen some recipes, particularly in the south, that add cayenne pepper to the mix as a cold cure.
In an electric power system, switchgear is the combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Switchgear is used both to de-energize equipment to allow work to be done and to clear faults downstream. This type of equipment is directly linked to the reliability of the electricity supply. The earliest central power stations used simple open knife switches, mounted on insulating panels of marble or asbestos.