**About the Editor**

**Anand K. Bhatia** is Scientist Emeritus at NASA/Goddard Space Flight Center in Greenbelt, Maryland, USA. Before receiving his PhD from the University of Maryland in 1963, he taught for a year at the Wesleyan University in Connecticut. He was a National Academy Research Fellow from 1963 to 1965 and then joined the staff at Goddard. He developed the method of symmetric three-body Euler angle decomposition (with A. Temkin). He specializes in calculations of bound states, Feshbach resonances, and scattering of electrons and positrons using his hybrid theory. He has applied his results to the opacity of the atmosphere of the Sun and the opacity of the late-type stellar atmosphere, pointing out the importance of positrons in addition to electrons. He is a fellow of the American Physical Society.
