Papers – Page 2 – British Astronomical Association

Four images of Jupiter, arranged in a square: these are yellow and blue (top left and right), red (bottom left) and RYB (bottom right). Key feaures are described in the caption.

The opposition of Jupiter, 1955–’56

During the previous apparition, there was a weak Revival of the South Equatorial Belt. This was followed during 1955–’56 by

Diagram showing neutron star as black spot in centre, with rotation axis oriented from bottom left to upper right. The magnetic axis is offset to this, and radiation is emitted (denoted by black arrows) from both magnetic poles.

Pulsar detection & verification with small-aperture antennas

Following a brief introduction to pulsars and how to intercept radio-frequency transmissions from them, this article describes the design and

Sunspots noticed accidentally – a preliminary survey

A survey of British newspapers has uncovered 41 sightings of sunspots made by untrained people with no optical aid and

Early members of the New South Wales Branch of the British Astronomical Association

In 1894, three Sydney members of the British Astronomical Association – John Tebbutt, Walter Gale and Robert Innes, all well-known

Selenehelion: imaging the Sun & full Moon at the same time with one camera

Direct, simultaneous imaging of the full Moon rising as the Sun was setting proves that both objects can be seen

A screenshot, with area given on the left (this is repeated in Table 1, given in the PDF of the paper), and including a diagram of the group's area on the solar disc, with the extent of the group highlighted in red on a white background with equator and north-south axis shown in black lines.

The size of the Carrington Event sunspot group

The size of the sunspot group that produced the white-light solar flare observed by Carrington and Hodgson in 1859 is

Noctilucent cloud over Loch Lomond. The clouds appear electric blue, bright against a dark sky which graduates to an orange glow above the mountainous horizon. Waves on the Loch's surface are in the foreground.

Noctilucent cloud over Britain & Western Europe, 2023

Noctilucent cloud forms in the mesosphere at an altitude of about 83 km and appears annually in northern latitudes between

A plot of (B-V) (x-axis) against (U-B) (y-axis), with fitted curves corresponding to the locations on the plot of cluster members (represented with scatter points). The fits decrease at low (B-V), level off in the middle, then decrease more steeply again.

A free, Excel-based application for UBVIc photometric studies of galactic open clusters

Due to their discrete brightness and uncrowded appearance, open clusters are accessible to many amateur instruments. Moreover, their photometric study

Lunar domes near the crater Cleomedes

The Nectarian-aged Crisium basin is characterised by prolonged lunar volcanism ranging from the Imbrian age to the Eratosthenian period. In

A rare outburst of the WZ Sge-type dwarf nova PQ Andromedae

A report of the Variable Star Section (Director: J. Shears) We present a light curve of the 2020 outburst of