March 20 in Universe History: Space Missions, Astronomy and Exploration
March 20, 2026
1916
On March 20, 1916, Albert Einstein submitted his review Die Grundlage der allgemeinen Relativitätstheorie to Annalen der Physik; later printed that year, it consolidated general relativity’s field-equation framework and became a cornerstone for modern gravitational physics and astronomy, supporting predictions such as light deflection, perihelion precession, and gravitational waves.
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