international geodynamics service
51Age of the Earth — This article is about scientific estimates of the age of the Earth. For religious and other non scientific estimates, see Dating Creation. Earth as seen from Apollo 17 The age of the Earth is 4.54 billion years (4.54 × 109 years ± 1%) …
52Datum (geodesy) — Geodesy Fundamentals Geodesy · …
53Maurice Ewing — in 1948. Photo courtesy Columbia University Born May 12 …
54LAGEOS — 1 2 Imagen de LAGEOS 1 Organización 1: NASA #2: ISA Estado Ambos Activos …
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