everyday
10years
boofboofboofboof
many times
It depends on your definition of symetry
Dirty snowballs
every 76 years
Comets
Shoemaker-Levy9 crashed in to Jupiter in 1994.
Astrology is the "science" of predicting the future from events that occur in the heavens (watching stars, comets, planets, etc.). Traditionally comets are considered harbingers of (warnings of future) major events. Halley's comet in 1066 was considered to be the warning of the Normans defeating the Saxons at the battle of hastings.
every 5-10 years.
Every comet has its own orbit and its own timing in terms of how long it takes to orbit the sun.
Comets have wide orbital paths, they are great balls of ice and dust that can take hundreds of years to complete one orbit.
Astrology is the "science" of predicting the future from events that occur in the heavens (watching stars, comets, planets, etc.). Traditionally comets are considered harbingers of (warnings of future) major events. Halley's comet in 1066 was considered to be the warning of the Normans defeating the Saxons at the Battle of Hastings.
Rocky asteroids. Icy comets often live in and come from the Kuiper Belt.
Elections in the Bahamas often occur every 4 years.
they occur so often that they kill 400000 people a week