Pulsars are rapidly spinning neutron stars, the collapsed cores of once massive stars that ended their lives as supernova explosions. In this book, Geoff McNama

Clear and accessible introduction to the concept of time examines measurement, historic timekeeping methods, uses of time information, role of time in science a

From the foreword by Brian May: "Professor Lawrence, in this timely book, tackles an issue which is about to become highly contentious around the world... This

Until the nineteenth century all time was local time. On foot or on horseback, it was impossible to travel fast enough to care that noon was a few minutes earli

For the experienced amateur astronomer who is wondering if there is something useful, valuable, and permanent that can be done with his or her observational ski