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.
There are 4 types of solar eclipses and they are determined by what part of the Moon's shadow falls on the Earth: 1  Total: A total solar eclipse takes place when the Moon completely covers the Sun and casts its umbra and penumbra on Earth. 2  A total eclipse of the Sun can only take place when the Moon is at perigee.