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Download Navigating the Night Sky: How to Identify the Stars and by Guilherme de Almeida (auth.) PDF

By Guilherme de Almeida (auth.)

From the reviews:

"The writer, who's a widely known Portugese novice astronomer, methodically explains easy methods to realize the brighter stars and significant constellations and, hence, how to define one’s means round the evening sky. … This e-book does a good activity of doing what it units out to do. i like to recommend it to an individual who desires to discover the evening sky for the 1st time and know how the evening sky obvious to us alterations in the course of the evening and through the year." (Jocelyn Tomkin, The Observatory, Vol. one hundred twenty five (1186), 2005)

"The ebook is set how one can establish the celebs and constellations … . This booklet contains a pleasant number of cautious concept out diagrams which have compatibility in fantastically with the textual content … . i might fairly suggest it to a person who's new to astronomy or as a reference e-book for the ordinary observer. … due to this booklet … even the most recent observer may be off to a flying begin. … The language of the booklet is well available … ." (Samuel George, Photopresse, factor: forty four, October, 2004)

"The ebook is focused at beginners to astronomy … . the ebook is attention-grabbing and available, the suggestions mentioned are effortless to appreciate and the content material flows clearly, with chapters on selecting the constellations, stars and the celestial sphere. … the e-book closes with forty pages of appendices with plenty of valuable tables and knowledge. The diagrams … are specially transparent and concise … . This e-book will surely element the newcomer within the correct path! i'd suggest this useful consultant … ." (Mark Allison, well known Astronomy, July-September, 2006)

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Additional resources for Navigating the Night Sky: How to Identify the Stars and Constellations

Sample text

Carbon, iron, calcium and the other elements that are an integral part of our bodies and all objects around us, were forged in the stars of previous generations, which, on exploding, disseminated new elements and enriched the Universe. 7 The Colours of the Sta rs . _ . _ At first glance, all stars appear white. But further inspection reveals that some are reddish orange, such as Betelgeuse (ex Orionis), Antares (ex Scorpii), and Aldebaran (ex Tauri). Others are a shade of bluishwhite, such as Rigel (P Orionis) and Spica (ex Virginis).

If it were very far away, say, 9 light years, the Sun would shine with the same brightness as Polaris (second magnitude). Ifwe saw it 57 light years away it would be at the limit of visibility to the naked eye (magnitude 6). " '. " ...... As a star evolves, its brightness changes. It is usually, however, an extremely slow process, which would be undetectable over centuries of observation, let alone during the lifetime of a human being. The brightness of the Sun, for example, is little different from what it was 10,000 years ago.

The stars are lower in relation to the horizon thon in the previous diagrom. Notice that stars thai were visible just obove the horizon in the previous diogram hove now disoppeored from view. The date could be in ony yeor. Zenith • • •• Western horizon . • so Navigating the Night Sky Celestial equator S N South celestial pole extremes depend on the latitude of the viewing location. There are two special and fascinating cases. To people living on the equator, all stars rise and set. There are no circumpolar stars.

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