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Archives

A colour image of the variable reflection nebula NGC 6729, taken by Terry Evans. It appears blue-ish, with some black absorption nebulosity occluding also visible and occluding the background stars

Brightness variations in R CrA & NGC 6729 during 2021

An indicative luminance light curve for R CrA created from data collected during 2021 showed a brightness range between magnitudes

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Rippling clouds of electric blue set against a dark northern sky, tinged with light as if twilight.

Auroral & noctilucent cloud activity, 2023 June 19 – August 18

With coronal mass ejections and sunspot numbers regularly in triple figures, the odd X-class flare and several coronal holes, the

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The y axis gives the signal to noise ratio (SNR) and the x axis gives the epoch numbers. Each SNR curve starts low and tends towards a flat higher number as the epoch number increases

Image denoising in astrophotography – an approach using recent network denoising models

Image denoising is an important consideration for improving the accuracy of acquired data. Given the morphological nature of astrophotography, with

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A star field containing the dwarf nova in outburst

The 2021 superoutburst of the dwarf nova LL Andromedae

We present photometry of the 2021 outburst of LL And, which was only the fourth confirmed on record, with a

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The white telescope tube is mounted on an equatorial mount upon a plinth.

The New South Wales Branch of the BAA & the Sydney University Observatory

The first university observatory in Australia was opened at the University of Sydney in 1909, with help from members of

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Black and white pencil drawings of Mars arranged in five rows and labelled A to T, with key features appearing as described in the caption

The opposition of Mars, 2020: Part II

A report of the Mars Section. Director: R. J. McKim. We report seasonal timings of the appearances and disappearances of

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Seven drawings, labelled a to g. The first four appear yellow, red, blue and white, respectively, due to filters used. Cloud markings appear as dark smudges. The last three are in white (integrated) light, i.e. with no filter.

The 2021–’22 eastern elongation of Venus

A report of the Mercury & Venus Section. Director: P. G. Abel This paper covers observations of Venus made by

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Mazin and ten schoolchildren pose by his telescope in the sun, with rugged mountains in the background

Searching for sky

  My story began with a photo. I was reminiscing over an old photo album and found a picture of

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The total solar eclipse of April 2023, at totality

The 2023 total solar eclipse, Australia

  On Apr 20, the Universe graced us yet again with one of the most awe-inspiring of events – a

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The radio dish of the Lovell Telescope

An astronomical day out in rural Cheshire

  One of the most iconic astronomical sights in this country surely must be the Lovell Telescope at Jodrell Bank,

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