Just had a look here to view the shortlist
https://www.rmg.co.uk/whats-on/astro...2020/shortlist as I know a few aussies have made it. I understand that the website only features a selection of images,not the full shortlist, but when you examine the 11 images posted we get:
Deep Sky 1 Image
Solar System 2 Images (1 of which is a reprocess of Juno data)
Eclipse 1 Image
Aurora 3 Image
Nightscape 4 Images
Additionally, all 3 Aurora shots and the eclipse shot have terrestrial foregrounds so we have 8 out of 11 images with the earth as a dominant feature. One of the nightscape images actually featured the earth and clouds, not even one non-terrestrial object included!! Hmmmmmm! Not denigrating the efforts of nightscape photographers, but personally not sure the people selecting the shots to showcase know a lot about astronomical imaging?