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.
An annual solar eclipse requires the moon to pass centrally in front of the sun, but occurs when the moon is at too great a distance to occlude the sun completely.A total eclipse occurs when the moon is able to occlude the sun completely and happens somewhere on Earth approximately every 18 months.