A lovely, vintage 1968 cover of Science Magazine to celebrate the international #ObserveTheMoon night, featuring a lunar gravimetric map of the earthside hemisphere, obtained by the Lunar Orbiter spacecraft tracking data.

https://www.science.org/toc/science/161/3842

#moon #gravimetry #map #astronomy #astrophysics #astrodon #universe #space #science #research #cover #sciencecovers #lunarorbiter #spacecraft