Archives
BAA members use remote telescopes to probe binary stars for exoplanets
It is well known that two orbiting objects do so around a common centre of gravity, or barycentre. What is
Read moreThe Hewitt Camera Archive revisited
Older BAA members will recall that in 1990 the Association took ownership of an archive of approximately 11,000 Schmidt Camera
Read moreA feast of variable nebulae
Winter is the season to observe change in a rare group of deep sky objects, the variable nebulae. Suspected variability
Read moreThe BAA Memoirs: an introduction
With the publication of a DVD set of the BAA Memoirs during 2017, a short historical review of these publications seems timely. Most of the Memoirs presented the longer reports of the Observing Sections of the Association, and until just after World War II they were issued fairly frequently, with several numbers appearing every session. From the 1950s they became one-off publications, produced on increasingly rare occasions, with Section reports mostly appearing in the Journal. This article explains how these changes came about, and attempts to give an idea of the diverse nature of this series of lesser-known BAA publications.
Read moreThe first recorded aurora australis?
This paper presents evidence for a probable aurora australis report and persistent recurrent solar activity in the year 1580.
Read moreFrank Wilsenham Hyde (1909-1984): Radio astronomer extraordinaire!
Frank Wilsenham Hyde was a popular character in the BAA from 1957 to 1966, receiving the Association’s Merlin Medal in 1963 and serving briefly as the Editor of the Journal from 1963 November to 1965 December. His extraordinary Radio Astronomy Observatory was the most advanced amateur facility in the UK during the 1960s, and the media even described it as ‘a miniature Jodrell Bank’. However, increasing financial problems led to his dramatic exit from the Association and the dismantling of his observatory in 1967.
Read moreLunar eclipse brightness and the terrestrial atmosphere
This work presents a study of the brightness of 164 lunar eclipses which were observed between 1670 and 2015. Data were analysed via four equations, which we refer to as the Formulae of Colle Leone, named after the observatory with which the author is associated. Attention is given to the quantity of ozone in the stratosphere and to the total optical depth of the atmosphere. The optical depth is correlated with both volcanic phenomena and human activities. No evidence of a correlation was found between the optical depth and solar activity.
Read more