A multitude of measurement units exist within astronomy, some of which are unique to the subject, causing discrepancies that are particularly apparent when astronomers collaborate with researchers from other disciplines in science and engineering. The International System of Units (SI) is based on seven fundamental units from which other units may be derived, but many astronomers are reluctant to drop their old and familiar systems. This handbook demonstrates the ease with which transformations from old units to SI units may be made. Using worked examples, the author argues that astronomers would benefit greatly if the reporting of astronomical research and the sharing of data were standardized to SI units. Each chapter reviews a different SI base unit, clarifying the connection between these units and those currently favoured by astronomers. This is an essential reference for all researchers in astronomy and astrophysics, and will also appeal to advanced students.

When young Drake Dalton witnesses a tragic loss on his tenth birthday, his sense of normality also dies on that same night. The ordinary childhood that he enjoyed, life at home with his parents and his connection with his genetically idiosyncratic best friend, Francis Conway, are all relegated to the past tense. But in his personal grief, he meets a paranormally-gifted individual named Daniel, who guides Drake in the unknown, secret history of Earth and the Dragons who roamed it, with the potential for vast power and knowledge. In New York City, the global enterprise known as Infinity, is resuming a project which was delayed for years. Bill West, the owner of the firm, pins his hopes on the project he believes that will not only herald the golden era of the company's history, but will also change the world. As Drake grows through adolescence, so too does his repertoire of abilities under the watchful presence of Daniel. The young and inexperienced protagonist endures many challenges in this tale of drama, action, romance, crime and conspiracy. As Drake Dalton, he must cope with the inner conflict of conforming to humanity for the sake of his family and friends, but he must also shield his secrets, as he pursues the truth and justice for the sake of the world, in the disguise of his alter ego: Dragonman.