William Ward Names AAAS Fellow

Ward is particularly known for helping to formulate the giant impact theory of lunar formation, discovering the oscillations in Mars' polar axis that drive strong martian climate variation over time, and discovering numerous aspects of the complex and subtle dynamical interactions between young planetary objects and gaseous or particle disks.

"William Ward has made many fundamental contributions to our understanding of how planets and satellites form and dynamically evolve," says Dr. Robin Canup, associate vice president of the Planetary Science Directorate. "Multiple aspects of planetary science would be very different today were it not for his groundbreaking research."