  We derive the short distance interaction of star polymers in a colloidal
solution. We calculate the corresponding force between two stars with arbitrary
numbers of legs f_1 and f_2. We show that a simple scaling theory originally
derived for high f_1, f_2 nicely matches with the results of elaborated
renormalization group analysis for f_1 + f_2 =< 6 generalizing and confirming a
previous conjecture based only on scaling results for f_1=f_2=1,2.
