Irwin Shapiro was awarded the 2013 Einstein Prize of The American Physical Society. The Prize was established to recognize outstanding accomplishments in the field of gravitational physics and consists of $10,000 and a certificate that includes the appropriate citation. The citation that will appear on

Irwin's certificate reads as follows:

"For his contributions to experimental solar system tests of relativistic theories of gravity, and in particular for proposing and measuring the Shapiro time delay effect."

The Einstein Prize will be presented at APS April 2013 Meeting in Denver, CO, April 13-16, 2013, at a special Ceremonial session.