| Did you mean to convert | arcsecond second |
to | gigaarcsecond gigasecond |
How many second in 1 gigasecond? The answer is 1000000000. We assume you are converting between second and gigasecond. You can view more details on each measurement unit: second or gigasecond The SI base unit for time is the second. 1 second is equal to 1.0E-9 gigasecond. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between seconds and gigaseconds. Type in your own numbers in the form to convert the units!
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You can do the reverse unit conversion from gigasecond to second, or enter any two units below:
The second (symbol s) is a unit for time, and one of seven SI base units. It is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom at zero kelvins.
The SI prefix "giga" represents a factor of 109, or in exponential notation, 1E9.
So 1 gigasecond = 109 arcseconds.
The definition of a second is as follows:
A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, or 1/3600 of a degree of arc or 1/1296000 (approximately 7.7×10-7) of a circle. It is the angular diameter of an object of 1 unit diameter at a distance of 360×60×60/(2pi) (approximately 206,265 units), such as (approximately) 1 cm at 2.1 km, or, directly from the definition, 1 astronomical unit at 1 parsec.
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