The first recorded sighting by Europeans was in September 1529 by the Spanish navigator Álvaro de Saavedra on board his ship La Florida when trying to return to New Spain , and was charted as Buenos Jardines (Good Gardens in Spanish).  The Marshalls lacked the wealth to encourage exploitation or mapping. The British captain Samuel Wallis chanced upon Rongerik and Rongelap atolls while sailing from Tahiti to Tinian. The British naval captains John Marshall and Thomas Gilbert partially explored the Marshalls in 1788. 
The first paper seemed to point out a contradiction between the electrodynamic theory and the relativistic one concerning the calculation of the electromagnetic masses, as the former predicted a value of 4/3 U/c 2 . Fermi addressed this the next year in a paper "Concerning a contradiction between electrodynamic and the relativistic theory of electromagnetic mass" in which he showed that the apparent contradiction was a consequence of relativity. This paper was sufficiently well-regarded that it was translated into German and published in the German scientific journal Physikalische Zeitschrift in 1922.  That year, Fermi submitted his article "On the phenomena occurring near a world line " ( Sopra i fenomeni che avvengono in vicinanza di una linea oraria ) to the Italian journal I Rendiconti dell'Accademia dei Lincei . In this article he examined the Principle of Equivalence , and introduced the so-called " Fermi coordinates ". He proved that on a world line close to the time line, space behaves as if it were a Euclidean space .