Complex sentence: He was educated at Iowa State University where he earned his B.S. in 1983 and at University of California, Berkeley earning his Ph.D. in 1988 and continued his research at the Harvard-Smithsonian Center for Astrophysics.
Split into simpler sentences: He was educated at Iowa State University, where he earned his B.S. in 1983, and at University of California, Berkeley, earning his Ph.D. in 1988. He continued his research at the Harvard-Smithsonian Center for Astrophysics.