Measuring the spin distribution of supermassive black holes is of critical importance for understanding how these black holes and their host galaxies form and evolve over time, yet this type of study is only in its infancy. This brief describes how astronomers measure spin in supermassive black holes using X-ray spectroscopy. It also reviews the constraints that have been placed on the spin distribution in local, bright active galaxies over the past six years, and the cosmological implications of these constraints. Finally, it summarizes the open questions that remain in this exciting new...

Description: Struggles for Shalom is a collection of essays by biblical scholars about peace, justice, and violence in ancient Jewish and Christian texts, written to honor the life work of Mennonite scholars PerryB. Yoder and WillardM. Swartley. In this volume, twenty-three authors--colleagues, former students, friends, and others influenced by Yoder's and Swartley's scholarship--add to the honorees' work in appreciation for their shared focus on biblical texts' lessons of peace. Specific texts and topics include Eccl 3:1-9 and time for war, Ezek 14:12-23 and God's retribution, Luke 22:31-61...