Links

• Research Website
  

Awards

• American Geophysical Union Macelwane Award
  1977
• American Geophysical Union Fellow
  1977
• American Association for the Advancement of Science Fellow
  1981
• Royal Astronomical Society Harold Jeffreys Lecturer
  1987
• Royal Astronomical Society Associate
  1992
• International Academy of Astronautics Full Member
  2000
• Committee on Space Research Space Science Award
  2002
• Highly Cited Researcher, Institute for Scientific Information
  2002
• National Academy of Sciences National Associate
  2002
• Space Science Award from COSPAR
  2002
• International Astronomical Union Asteroid (21459)
  2008
• NASA Exceptional Scientific Service Award
  2013
• NASA Distinguished Public Service Medal
  2017

Research Areas

• Planetary Science
• Space Physics

Membership in Academies and Societies

• American Geophysical Union