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Nixon came to office just in time to preside over the Apollo 11 lunar mission. At that time, the space program was a national priority due to the Kennedy goal of landing a man on the moon by the end of the 1960s. However by the time Neil Armstrong made that first footstep, public support for large-scale space projects had diminished. Nixon, therefore, made a number of policy decisions that redound to this very day.
That's important because it has allowed astronomers to put the strongest limits yet on the strength of gravitational waves in this part of the universe. Earlier this year, the same team used a similar approach with terrestrial seismic data to strengthen the existing limits by 9 orders of magnitude. The lunar data betters this by yet another order of magnitude because there is no noise from sources such as oceans, the atmosphere and plate tectonics. The work shows that good science on gravitational waves can be done without spending the hundreds of millions of dollars for bespoke gravitational wave detectors, such as LIGO, which have yet to find any evidence of the waves either.