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Born
Friedrich von Struve was born -
Discovered double stars
In 1827, he discovered a vey large amount of double stars
Double stars- stars that appear to be very close to each other from Earth through a telescope -
Measured
measured "constant of abberation" in 1843
Constant of abberation-astromical phenomenon which produces apparent motion of celestial objects about their real locations -
Died
Friedrich von struve died