Candles are a leading cause of home fires and fatalities. Soot on the walls and furnishings is unsightly, and may also be a sign of serious problems. It may also be unhealthy, as inhalation of minute particles of soot has been documented to cause health problems.
It is a popular misconception that the phenomenon of a total eclipse of the sun is a rare occurrence. Quite the contrary. Approximately once every 18 months (on average) a total solar eclipse is visible from some place on the Earthâs surface. That's two totalities for every three years.
The Moon is immediately behind the Earth in its orbit. Lunar eclipses can be partial or total. The alignment of Sun, Earth, and Moon happens 2 to 5 times a year for solar eclipses, but total eclipses occur about once every 18 months, and affect only a small area on the Earth's surface.