The Royal Observatory Greenwich has announced their shortlist of images for their Astronomy Photographer of the Year award. Now in its sixth year, the competition will end on September 17. But in the meantime, we get to look at some incredible images of space.

Many of the pictures that made it to the finals were the bright green ribbons of the aurora borealis, which illuminated swaths of the northern hemisphere this year. There were a few images of deep space, but many of the entries focused on the juxtaposition of some of Earth’s most iconic landmarks (Old Faithful, the Giant’s Causeway) with the heavens.

Click through the slideshow above to see some of our favorite images from the shortlist. Captions for the slideshow were provided by the Royal Observatory Greenwich. To see all the shortlisted entries, visit the contest’s Flickr album.