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Archives

Aurora and noctilucent cloud in a single 20-second exposure, captured on 2013 Aug 5 at 01:38 UT.

Joint meeting of the Radio Astronomy Section and Aurora & Noctilucent Cloud Section, 2022 March 4

This joint meeting was held over Zoom on Friday, 2022 Mar 4. Commencing at 7.30 p.m., it featured presentations by

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Aristarchus and Herodotus, again on 2021 April 24, but with a Wratten 21 filter.

Observing banded lunar craters with optical filters

Here Paul outlines an observing project that does not require elaborate equipment, so is well suited to BAA members who

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Sky notes for 2022 June & July

With the summer solstice occurring on Jun 21, this time of year can be regarded as the ‘silly season’ for

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HR Lyrae: the restless slumbers of an old nova

A report of the Variable Star Section. Director: J. Shears.   We present the light curve of the old nova

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Celebrating Mary Somerville (1780–1872)

In the Journal’s Christmas Quiz, Marie-Louise Archer featured a question about the contributions to astronomy made by Mary Somerville. With

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NEMETODE detects 500,000th meteor

NEMETODE (NEtwork for MEteor Triangulation and Orbit Determination) was founded in 2012 by William Stewart (Ravensmoor, Cheshire) and Alex Pratt

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The Royal Astronomical Society Christmas Tree. Image courtesy of David Arditti.

Winners of the BAA Christmas Quiz

Thank you to all who had a go at the Journal’s Christmas Quiz, the answers for which were in the

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Asteroid (7177) Melvyntaylor

Melvyn Taylor, one of the Association’s most active visual observers, passed away in 2017 August. Last autumn Mark Simpson (a

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Figure 3. Different observations arranged according to the decreasing position angle of the location along the lunar limb that is maximally tilted towards Earth. Details of the equipment used are given in the text. The peaks of Montes d’Alembert are subdivided into a northern group (red brackets) and a southern group (white brackets). North is up.

Identifying the peaks of Montes d’Alembert

The Montes d’Alembert are a chain of mountain peaks found along the western lunar limb. The individual mountains were grouped

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Figure 2. WAC image of the examined region. Note the dome Lavoisier 4, which is not prominent as in the telescopic image (Figure 1). The image is shown in cylindrical projection, removing the foreshortening.

Lunar domes near Lavoisier K

In this study, we examine four lunar domes located near the crater Lavoisier K. The large domes, termed Lavoisier 1–3,

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