Complex sentence: Kaj Aage Gunnar Strand (27 February 1907-31 October 2000) was a Danish astronomer who worked in Denmark and the U.S.A. He was Scientific Director of the U.S. Naval Observatory from 1963 to 1977.
Split into simpler sentences: Kaj Aage Gunnar Strand (27 February 1907-31 October 2000) was a Danish astronomer. He worked in Denmark and the U.S.A. He was a director of the U.S. Naval Observatory from 1963 to 1977.