1. The problem statement, all variables and given/known data Like humans, astronomers of Venus use the same method for definitions of parallaxes and of parsec but measure them in different (their own) units. For example, the distance to Sirius equals to 19.6 vpc (19.6 venusial parsec). - Describe the most evident system of angular units used by astronomers of Venus. - Calculate the venusial diurnal parallax of the Sun and write the answer in “vau” (venusial angular units – the common angular units for astronomers of Venus). Note: citizens of Venus have two hands (as humans), and 7 fingers at each hand. 2. Relevant equations 3. The attempt at a solution The distance between Sirius and Sun is equal to 2,6 pc. If we take the definition of the parsec and aply it to Venus, we find out that 1 vpc=0,723 pc. So distance from Sun to Sirius is d=2,6 pc = 3,596 vpc Ok ,so now I have to relate 19,6 vpc with 3,596vpc , but how?( I might think about the ideea of numerical base conversion, because of the fingers, but it still doesn't work for me). In the picture below alpha=1".