Titlebook: Observing Comets; Nick James,Gerald North Book 2003 Springer-Verlag London 2003 Planet.astronomy.comets.instruments.observational

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Visual Practices,mputer-controlled telescope can find and then track any celestial body. The CCD astrocamera plugged into it can obtain images that years ago would have required a large professional telescope. The amateur’s computer can perform image processing, and even astrometry and photometry. Tasks that were th

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Comets in Camera,d a seven second exposure on a collodion photographic plate. The resulting image of Comet 1858 VI Donati showed the bright nucleus and a faint tail and the photographer was sufficiently excited to send a copy to a leading astronomer of the time, Richard Carrington.

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Comets and Computers,ets are in very long, thin orbits which have periods of thousands of years. They are usually discovered a few months or, exceptionally, years before they reach their best and most of them behave in a highly unpredictable manner. In fact, probably the only thing that can be predicted about a comet is

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Improving Your Image,ld choose a particular developer, film and print paper to achieve the desired contrast and you could selectively adjust the density of the print at different points in the image by moving a sheet of cardboard under the enlarger but that was about it. It was particularly difficult to print a photogra

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Recent Great Comets,hen we experienced two comets worthy of the “Great” title. Comet Hyakutake was discovered only two months before it reached its best. It was a small comet which came very close to the Earth and gave us a spectacular view for a few short weeks. Comet Hale-Bopp on the other hand was a leviathon. It wa

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Nick James,Gerald Northon spatial resolution and geocoding techniques. Due to privacy concerns, health data are often aggregated into areal units, resulting in limitations related to data aggregation and the Modifiable Areal Unit Problem (MAUP). Geographic Information Systems (GIS) have tools for addressing the MAUP and o

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Nick James,Gerald Northan Cancer Atlas, first launched in 2018 and recently updated to version 2.0 in 2024, provides a significant step in revealing how the impact of cancer varies by small geographical areas. This unique initiative uses advanced spatial and spatio-temporal models within the Bayesian framework, along with