Complex sentence: This work resulted in the 1956 paper he co-authored with Humason and Allan Sandage, on the rate of expansion of the Universe that listed over 800 redshift values (300 determined by Mayall) for galaxies measured from 1935 to 1955 at Lick, Wilson and Palomar.
Split into simpler sentences: This work resulted in the 1956 paper he co-authored with Humason and Allan Sandage, on the rate of expansion of the Universe. The paper listed over 800 redshift values (300 determined by Mayall) for galaxies measured from 1935 to 1955 at Lick, Wilson and Palomar.