1846 – He was born in Providence, Rhode Island.
1870 – He graduated from Dartmouth College, then went to work as a clerk for the U.S. Government.
– He served as an assistant astronomer for a government expedition to survey the U.S-Canadian border.
1876 – He became the directory of the Dudley Observatory in Schenectady, New York.
– He led an expedition to Chile to observe the transit of Venus, and also catalogued information concerning cometary orbits.
1905 – Boss was awarded the Gold Medal of the Royal Astronomical Society.
1909 – He became editor of the Astronomical Journal.
1910 – He published Preliminary General Catalogue of 6188 Stars for the Epoch, a compilation of the proper motions of stars.
1915 – Lewis Boss died.