William HerschelDiscoverer of the Deep Sky. E-book. Formato EPUB Wolfgang Steinicke   -  Books On Demand, 2021  - 

The book describes the observational work of William and Caroline Herschel. It focuses on deep-sky objects, observed 1774-1817. Most were discovered by William in the monumental sweep campaign (1783-1802), assisted by his talented sister. 2500 objects were published in three catalogues. The study of the sky from southern England also concerned double stars and the Solar System, yielding the Uranus discovery in 1781. But William Herschel was much more than a mere observer. He built large reflectors, developed new methods and thought about the nature and evolution of cosmic objects and the structure of the Milky Way. He was an extremely influential astronomer and had a worthy successor, his son John.

Nebulae Star Clusters GalaxiesHistory Astrophysics Observation. E-book. Formato EPUB Wolfgang Steinicke   -  Books On Demand, 2019  - 

Nebulae, star clusters, and galaxies are outside our solar system. They belong to the 'deep sky' and lead the observer to great distances and at the same time the view goes far into the past. The light of the most distant galaxies took billions of years to reach us. No less fascinating is our home galaxy, the Milky Way, offering many bright nebulae and star clusters.The book covers three important topics related to deep-sky objects: history, astrophysics, and observation. When beginners observe an object visually, not knowing anything about it, they will only perceive a faint spot of light - nothing really exciting. So, to get the right 'cosmic' feeling, the view should be enriched with stories about the object's discovery, distance, physical nature, or evolution. Supplied with this kind of information, deep-sky observing becomes a fascinating activity - braving the cold and darkness. Over time, advanced fields such as observation techniques or astrophotography come into play. The book informs the reader about all these topics and offers a comprehensive collection of interesting targets.