was he also us's citizen?
Yes
Albert Einstein
In February 1933, while on a visit to the United States, Einstein knew he could not return to Germany with the rise to power of the Nazis under Germany's new chancellor, Adolf Hitler.

when does the solor eclipse start and end This occurs when the Sun, Moon and Earth are aligned and ends when they are not aligned what are its kinds? UNANSWERABLE how many times does it takes place in an year? Between two and five solar eclipses occur every year, with at least one per eclipse season. what was observed in this context during 1919? The observation of a total solar eclipse of May 29, 1919, helped to confirm Einstein's theory of general relativity. what is this last theory? General relativity generalizes special relativity and refines Newton's law of universal gravitation, providing a unified description of gravity as a geometric property of space and time or four-dimensional spacetime. when was it stated? 1915 the person who stated this theorem; who was he? Albert Einstein what was his profession? Theoretical physicist did he experience a refugee life? Yes why? Einstein discovered that the new German government had passed laws barring Jews from holding any official positions, including teaching at universities. he was a scholar of which institute? Institute for Advanced Study which scientific paper was his first one? "Folgerungen aus den Capillaritätserscheinungen" ,and thesis, "pro-forma" where was he from? Munich, Germany
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Albert Einstein [SEP] 1933: Immigration to the US
Later on they heard that their cottage was raided by the Nazis and his personal sailboat confiscated. Upon landing in Antwerp, Belgium on 28 March, he immediately went to the German consulate and surrendered his passport, formally renouncing his German citizenship. The Nazis later sold his boat and converted his cottage into a Hitler Youth camp.