Richard Berry Libri

Many observers have concerns about their telescope's accuracy, often unsure how to verify claims made by manufacturers. While there are methods to check individual components, they can be complex or require expensive reference optics. Telescope users are primarily interested in the performance of the entire optical system, not just one element. A practical solution is needed to diagnose all factors affecting telescope performance at the observing site. The star test offers a straightforward and comprehensive method. It utilizes the entire working telescope rather than relying on partial optical system tests. This time-tested and sensitive optical test examines the diffraction image directly, providing insights into the complete imaging performance. The star test is quick and only requires a good high-power eyepiece, assessing the telescope's intended function. Instruments that are poorly aligned or defective will clearly fail the star test, allowing for immediate corrections in the field, which is especially helpful when users are in a hurry. This method empowers telescope users to ensure their equipment performs optimally without the need for complicated shop tests.

Book by Reeves, Robert

This accessible guide helps you identify constellations and other celestial features, whether you're hiking, camping, or stargazing from home. It offers a comprehensive tour of stars and constellations visible to the naked eye, along with deep-sky objects observable with binoculars or a simple telescope. Led by Richard Berry, editor of Astronomy magazine, the book features two-color, computer-plotted sky maps and clear instructions to enhance your stargazing experience. The core of the guide includes two sections of detailed sky maps and charts. The first section presents twelve maps showing the entire sky for each month, outlining all constellations visible in the Northern Hemisphere, accompanied by rich ancient mythology related to these star groups. The second section contains twenty-three detailed star charts, highlighting key stars and leading you to intriguing features such as stars with unusual colors, double stars, variable stars, nebulae, and galaxies. Chapters cover essential topics like the movement of stars, navigating the moon and planets, creating an astronomer's flashlight, and selecting and using a telescope—all explained in easy-to-understand terms. This guide serves as a perfect introduction to astronomy, suitable for beginners yet rich in information for continued exploration of the night sky.

" La peur de la mort a envahi notre famille comme un raz-de-marée dévaste une ville ", écrit Richard Berry, le frère de Marie, dans la préface de ce livre. " Nous n'étions pas préparés mais nous avons résisté, ajoute-t-il, Marie a résisté. " Marie Berry, atteinte d'une maladie génétique qui condamne ses fonctions rénales à s'arrêter un jour, résiste, en effet. A une enfance douloureuse, à l'épuisement, aux dialyses. Mais ses parents veillent sur elle. Elle a dix-sept ans quand sa mère lui offre un de ses reins. Et quand ce rein va se mettre en rejet, trente-trois ans plus tard, c'est Richard, le frère aîné, qui à son tour va la sauver. Entre-temps, la jeune femme, fragilisée, a refusé de n'être qu'une malade au long cours. Elle a travaillé, mis au monde un enfant, adopté une petite fille parce qu'à tant recevoir des autres, elle a voulu donner à son tour. Aujourd'hui, Richard et Marie se sont engagés à encourager le don d'organes et y consacrent une énergie nouvelle : celle que l'une a puisée dans la reconnaissance, et que l'autre a trouvée dans Le Don de soi. Ce livre est le témoignage, débordant de courage et d'amour, d'une vie deux fois offerte, et vaillamment reconstruite. Un message d'espoir pour tous les malades, une invitation au partage pour tous les bien portants.