The weight of the lunar module, on top of the command and service module, was the main reason why the Saturn V rockets that shot Apollo astronauts into space needed to be the tallest, heaviest and most powerful ever flown, a record they still hold.

ECONOMIST: Space lifts

Artist renderings of the module resemble a tinfoil clown nose grafted onto the main station.

NPR: Space Station To Get $18 Million Balloon-Like Room