So, what is an LDU precisely? It’s the smallest incremental size used to define LEGO’s dimensions. For context, a standard LEGO brick is 20 LDUs wide, and a single plate is 8 LDUs tall.

"The Lego element used for the [RS-25] main engine nozzles was originally meant to depict a beehive but is called 'Mini hat no. 54,'" wrote Schlömer. Two tail service mast umbilicals located on ...