Changes in the spectrum of Z Ursae Majoris during its rise through a maximum in 2014 June
The semiregular variable Z UMa experienced a particularly deep minimum at the end of 2014 March, followed by a three-month rise to maximum.
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Early research on the effects of solar eclipses on radio propagation
Research prompted by a slide included in a recent presentation recalling some of the contents of the archives of the Radio Society of Great Britain. This mentioned the involvement of the radio astronomy community in a study of radio propagation conditions a few days either side of the 1927 total solar eclipse.
Read moreA seldom-reported lighting phenomenon in the Cichus-Weiss region of the Moon
A brief note in relation to a strange lighting effect captured during sunrise over the Cichus-Weiss region of the Moon by Thomas Gwyn Empy Elger in 1888. A comparable observation made by the author in 2009 is discussed and assessed against recent CCD imagery. These comparisons confirm that the effect which led to Elger’s report is repeated under comparable conditions, and his original hypothesis in relation to the nature of the feature can now be clarified.
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Thomas G.E. Elger — a Victorian populariser of selenography
A biographical sketch of the first Director of the Association’s Lunar Section, Thomas Gwyn Empy Elger (1836-1897). His diverse contributions to lunar studies are placed in context and reviewed against the backdrop of developments and advances in the subject during his lifetime. The methodology he consolidated and developed for amateur selenographical work during his Directorship is also discussed in relation to current studies.
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Absolute Beginners No.1: The colours of stars
Step outside on any clear night and after a few minutes outdoors, when your eyes have adjusted, you will notice
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Aurora Section
Auroral activity in the first few months of 2015 remained at relatively low levels with only a few major displays,
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