You can reach Copernicus Science Centre with:
M2 metro line - Centrum Nauki Kopernik station and the following bus lines:
118, 127, 105 - Biblioteka Uniwersytecka" bus stop
185 - Metro Centrum Nauki Kopernik bus stop (in tunnel)
102, 162 - "Metro Centrum Nauki Kopernik"
You can reach the Centre directly from the Central Railway Station using bus line 127.
A single standard fare ticket costs 4,40 zł, 2,20 zł for reduced fare ticket.