<Dl> <Dd> <Dl> <Dt> Notes </Dt> </Dl> </Dd> </Dl> <Dd> <Dl> <Dt> Notes </Dt> </Dl> </Dd> <Dl> <Dt> Notes </Dt> </Dl> <Ol> <Li> Jump up ^ The value is actually the fifth root of 100, an irrational number known as Pogson's Ratio . See Australian Science Teachers' Association (2006). Teaching science, Volumes 52--53 . Australian Science Teachers' Association . p. 44 . Retrieved 2010 - 09 - 06 . </Li> <Li> ^ Jump up to: This list uses the assigned numbers from the nautical almanac, which includes only 57 stars . Polaris, which is included in the list given in The American Practical Navigator, is listed here without a number . </Li> <Li> ^ Jump up to: The suffix var after the numeric value denotes a variable star whose magnitude changes over time . </Li> <Li> Jump up ^ For more information, see the article changing pole stars . </Li> </Ol>

What star is used for navigation in the southern hemisphere