A yottaparsec is a unit of measurement used in astronomy to describe vast distances in space. It is equivalent to one septillion parsecs, or (10^{24}) parsecs. Since one parsec is approximately 3.26 light-years, a yottaparsec represents an extraordinarily large distance, highlighting the immense scales involved in the universe. This term is rarely used in practical applications, given the enormity of the distances it describes.
The absolute, largest unit of measurement is a Yottaparsec. 1 Yottaparsec is 3.08 x 10^40 metres! or 30,800,000,000,000,000,000,000,000,000,000,000,000,000 metres. Approximately 31 Duodecillion Metres
Well...im not too sure,but i think its a 1000.We do know for one thing,though,a yottaparsec=3.08x10^40m!That's insanely huge!!!It's something like this...30,800,000,000,000,000,000,000,000,000,000,000,000,000m
Contrary to popular belief, a light year is not the "longest unit". A parsec is. Or more specifically, a yottaparsec. The length of a parsec is found by constructing a hypothetical right triangle where corner A is the sun and has an angle of 90 degrees, and corner B is the earth (the assumed distance between the two is one AU, the average distance between them, approximately equal to149,597,870.7 kilometres¹), and corner C has an angle of 1 second of arc (1/3600 of one degree). A parsec, then, is the distance between A and C, approximately equal to 3.26 light years². The prefix "yotta" is the largest unit prefix of the SI denoting a factor 10^24 (a septillion, or 1000000000000000000000000) A yottaparsec therefore is a septillion parsecs, or 3.26 septillion light years, and is a distance far, far longer than the universe itself.
It is Meter , M