There is no set number, because new comets are discovered all the time. Not all comets that are discovered will be visible with the naked eye.
Comets - 1919 was released on: USA: 30 March 1919
AS is seen most commonly in males 30 years old and older
There are 15,724,800 minutes in 30 years.
hmm.. i wonder you idiot. 30 years was the 30 YEARS WAR.. you dumb idiot.
Bailey's Comets - 1973 - 1.4 was released on: USA: 30 September 1973
21 years.
2 Years can fit in 30 months.
4006
30 months = 2 1/2 years
30
30 years
In 30 years, there are 946,080,000 seconds. This is calculated by multiplying the number of years (30) by the number of seconds in a year (31,536,000).