As they say "On the shoulders of giants" so with astronomy and for the purpose of this week's Sunday Stamps hirsute theme, a fine beard. Kepler travelled
to meet Tycho Brahe near Prague in 1600 where Brahe was constructing a new observatory. Looking at their depiction in these two stamps they had not only astronomy in common.
Only a moustache from Albert Einstein . With that famous hair the addition of a beard might have been a little over the top.