Soviet monitoring as evidence for the Moon landings

Why is the Moon-landing conspiracy theory unconvincing?

The Soviet Union monitored Apollo closely and would have exposed a fraud if it could, but found no basis to do so.

The Soviet Union was a hostile and technically capable observer of the Apollo programme. Soviet institutions watched the missions throughout the space race and had every political incentive to reveal a fraud. They attempted to challenge the American achievement but could not disprove the landings. Independent observation by an adversary therefore carries more evidentiary weight than a claim built only on suspicion.