{"product_id":"9781461426141","title":"The Hill-Brown Theory of the Moon's Motion: Its Coming-to-be and Short-lived Ascendancy (1877-1984)","description":"\u003cp\u003eThis book, in three parts, describes three phases in the development of the modern theory and calculation of the Moon's motion. Part I explains the crisis in lunar theory in the 1870s that led G.W. Hill to lay a new foundation for an analytic solution, a preliminary orbit he called the \"variational curve.\" Part II is devoted to E.W. Brown's completion of the new theory as a series of successive perturbations of Hill's variational curve. Part III describes the revolutionary developments in time-measurement and the determination of Earth-Moon and Earth-planet distances that led to the replacement of the Hill–Brown theory in 1984.\u003c\/p\u003e","brand":"Springer New York","offers":[{"title":"Default Title","offer_id":47053980336368,"sku":"9781461426141","price":199.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/229274854.jpg?v=1753763067","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9781461426141","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}