Reverse:
In the central part – stylized elements taken from one of the figures of Athanasius Kircher’s scientific work (1602-1680), symbolizing one of the phenomena of mutual influence and interaction of celestial bodies. In the upper part - the coat of arms of the issuer.
On the outer ring - an inscription РЭСПУБЛIКА БЕЛАРУСЬ (the Republic of Belarus). Below - a transparent capsule containing a filigree insert plated with 24-carat gold. In the lower part - the face value 20 РУБЛЁЎ (20 rubles) and the year of issue (2013).