Plan to wash lots of clothes if you travel the world. (Photo: George Doyle/Stockbyte/Getty Images ) Phileas Fogg took 80 days to travel the world to win a bet. Nellie Bly beat that record by eight days to prove the resourcefulness of solo female travelers. Neither the fictional Fogg nor the ...
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.
A total eclipse occurs when the observer is within the umbra, an annular eclipse when the observer is within the antumbra, and a partial eclipse when the observer is within the penumbra. During a lunar eclipse only the umbra and penumbra are applicable.