Download Free 1 Jan 30 Apr 1783 Book in PDF and EPUB Free Download. You can read online 1 Jan 30 Apr 1783 and write the review.

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.
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.
Abstracts the names of those whose wartime purchase of previously unsold Phila. County land helped fund the PA troops in the Amer. Revolutionary army. The individ. who paid their private fortunes into the provisional commonwealth gov¿t. were taking financial risk & demonstrating real courage in their patriotism, for the land they were purchasing had been confiscated in 1779 from the Penn family proprietors of PA, who objected & asserted their continuing property rights. If the British had defeated the Amer. revolutionaries, the restored proprietary courts would have ruled the sales null & void & perhaps declared them an act of treason. The land would have reverted to the Penn family & the Amer. purchase money lost. Includes street locations .