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Author: United States. Congress. House
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 2794
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Book Description
Author: United States. Congress. House
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 2794
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Book Description
Author: United States. Congress
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 1470
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Book Description
Author: United States. Congress. House
Publisher:
ISBN:
Category : Legislation
Languages : en
Pages : 1344
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Book Description
Some vols. include supplemental journals of "such proceedings of the sessions, as, during the time they were depending, were ordered to be kept secret, and respecting which the injunction of secrecy was afterwards taken off by the order of the House."
Author: United States
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
Author: Marty Beyer
Publisher:
ISBN:
Category : Juvenile delinquency
Languages : en
Pages : 12
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Book Description
Author: United States. Congress. House. Committee on Merchant Marine and Fisheries
Publisher:
ISBN:
Category : Emergency Ship Repair Act of 1954
Languages : en
Pages : 96
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Book Description
Author: Martin Mobberley
Publisher: Springer Science & Business Media
ISBN: 038779946X
Category : Science
Languages : en
Pages : 247
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Book Description
In the Victorian era – or for non-British readers, the mid-to-late nineteenth century – amateur astronomy tended to center on Solar System objects. The Moon and planets, as well as bright comets, were the key objects of interest. The brighter variable stars were monitored, but photography was in its infancy and digital imaging lay a century in the future. Today, at the start of the twenty-first century, amateurs are better equipped than any professionals of the mid-twentieth century, let alone the nineteenth. An amateur equipped with a 30-cm telescope and a CCD camera can easily image objects below magnitude 20 and, from very dark sites, 22 or 23. Such limits would have been within the realm of the 100- and 200-inch reflectors on Mount Wilson and Mount Palomar in the 1950s, but no other observatories. However, even those telescopes took hours to reach such limits, and then the photographic plates had to be developed, fixed, and examined by eye. In the modern era digital images can be obtained in minutes and analyzed ‘on the fly’ while more images are being downloaded. Developments can be e-mailed to other interested amateurs in real time, during an observing session, so that when a cataclysmic event takes place amateurs worldwide know about it. As recently as the 1980s, even professional astronomers could only dream of such instantaneous communication and proc- sing ability.
Author: New Zealand. Statistics New Zealand
Publisher:
ISBN:
Category : New Zealand
Languages : en
Pages :
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Author: Steven A. Treese
Publisher:
ISBN: 9783319055459
Category : Petroleum
Languages : en
Pages :
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Book Description
Author: Serap Coban
Publisher: IJOPEC PUBLICATION
ISBN: 1912503824
Category : Business & Economics
Languages : en
Pages : 504
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Book Description
