He resumed his astronomical work after the war , including studying the positions of stars , the rotation of the Earth , and the brightnesses of stars . During this period he wrote his textbook '' General Astronomy '' . In 1922 he travelled to Christmas Island in an attempt to observe a total solar eclipse , intending to verify the deflection of the light of stars by the Sun that had been seen during a 1919 eclipse , but cloud defeated the attempts
1919 eclipse
Solar eclipse of May 29, 1919
Harold Spencer Jones