![Moonquake Detector--The Passive Seismic Experiment package (PS[EP)?] is a self-contained 100-pound seismic station with its own transmitter, [powered?] by solar cells. It will detect very alight motions of the lunar crust and [interior?] to help clarify the origin and structure of the Moon. Developed for the National Aeronautics and Space Administration, it will be carried aboard Apollo 11 [illegible] the United State's first lunar landing.](https://bpldcassets.blob.core.windows.net/derivatives/images/commonwealth:f1884w749/image_access_800.jpg)
Digital Commonwealth — Boston Public Library
Moonquake Detector--The Passive Seismic Experiment package (PS[EP)?] is a self-contained 100-pound seismic station with its own transmitter, [powered?] by solar cells. It will detect very alight motions of the lunar crust and [interior?] to help clarify the origin and structure of the Moon. Developed for the National Aeronautics and Space Administration, it will be carried aboard Apollo 11 [illegible] the United State's first lunar landing.
[ca. July 1969]
[Information from item housing] Lasers
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