Editorial

Welcome to our sixth issue of IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY! This July 2012 release marks the culmination of one full year of our new journal.We are very excited to mark this small anniversary with a feature article from astronomers, Dr. Paul Goldsmith of the NASA Jet Propulsion Laboratory, and Professor Dariusz Lis of the California Institute of Technology. They have kindly consented to review the latest THz results from the HIFI instrument, Heterodyne Instrument for the Far Infrared, launched as part of the European Space Agency's Herschel Space Observatory in May 2009.