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How do I get started in astronomy? Should I buy binoculars or a telescope? What can I expect to see? This wonderful informal guide to astronomy has all the information an absolute beginner needs to get started. It explains the basic techniques and equipment you need for exploring the night sky, from observing with the naked eye to using binoculars and telescopes. It then takes you on a tour of the night sky, covering the Moon, Sun, stars, planets, and more. The book gives sound advice on purchasing affordable binoculars, telescopes, and accessories, and is illustrated with photos taken by the author, showing how objects in the sky actually look through modest amateur equipment. Whether you are a parent thinking of buying a telescope for your children, or a newcomer yourself, this book has all you need to know to take the first steps into the fascinating world of astronomy.

Amateur astronomy --- Astronomy --- Scientific recreations

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Scientific recreations --- Handbooks --- manuals --- etc. --- Tricks --- Chemistry --- Experiments

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Ci sono 365 notti in un anno (366 se bisestile) e per l’astrofilo non ce ne sono mai due uguali. Il cielo ogni notte propone un suo show che ha per protagonisti migliaia di oggetti come stelle, costellazioni, pianeti, nebulose, da riconoscere uno ad uno, da ammirare e studiare. Sir Patrick Moore – celeberrimo conduttore televisivo inglese, astrofilo e divulgatore noto in tutto il mondo – ha scritto questo libro per suggerire all’amante del cielo quali oggetti di particolare interesse possono essere osservati in ciascuna diversa notte dell’anno. Vengono proposte mappe stellari di facile interpretazione, mentre il testo tratta di fisica, delle stelle e della loro storia, di sistemi binari, galassie, della Luna e dei pianeti: di tutto ciò che la volta celeste offre all’astrofilo curioso. Cosa hanno detto della prima edizione NEW SCIENTIST "…ben scritto e pieno di entusiasmo." ASTRONOMY & SPACE "Patrick Moore si è ripetuto. Che libro eccellente è questo.".

Astronomy --- Amateur astronomy. --- Scientific recreations --- Astronomy. --- Popular Science in Astronomy. --- Astronomy, Observations and Techniques. --- Observations, Astronomical. --- Astronomy—Observations. --- Astronomical observations --- Observations, Astronomical

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This second collection of interesting mathematical puzzles continues the tribute to Martin Gardner, who has provided us with original puzzles and puzzling stories ever since he created and produced the "Mathematical Games" column in Scientific American. The international community of puzzle enthusiasts has gathered once again to celebrate Martin Gardner's continued contribution and, most fittingly, has done so in kind, by providing new challenges to our inquiring minds. We proudly present this collection to the mathemagicians of the world for their enjoyment, as a playful provocation.

Mathematical recreations. --- Mathematical puzzles --- Number games --- Recreational mathematics --- Recreations, Mathematical --- Puzzles --- Scientific recreations --- Games in mathematics education --- Magic squares --- Magic tricks in mathematics education

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Flexagons are hinged polygons that have the intriguing property of displaying different pairs of faces when they are flexed. Workable paper models of flexagons are easy to make and entertaining to manipulate. Flexagons have a surprisingly complex mathematical structure and just how a flexagon works is not obvious on casual examination of a paper model. Flexagons may be appreciated at three different levels. Firstly as toys or puzzles, secondly as a recreational mathematics topic and finally as the subject of serious mathematical study. This book is written for anyone interested in puzzles or recreational maths. No previous knowledge of flexagons is assumed, and the only pre-requisite is some knowledge of elementary geometry. An attractive feature of the book is a collection of nets, with assembly instructions, for a wide range of paper models of flexagons. These are printed full size and laid out so they can be photocopied.

Polyhedra. --- Polyhedra --- Mathematical recreations --- Mathematics --- Physical Sciences & Mathematics --- Geometry --- Mathematical puzzles --- Number games --- Recreational mathematics --- Recreations, Mathematical --- Puzzles --- Scientific recreations --- Games in mathematics education --- Magic squares --- Magic tricks in mathematics education --- Geometrical models --- Models --- Mathematical recreations. --- Models.