This looks like the permanent "play raw" contest on pxls.us: someone submits a raw file, and the site patrons have a go at it with their favorite tools. It is customary to have at least a summary of the processing with the submission but often people post the "recipe" file.
Take a look at DarkTable ... Equalizer ... Luma
Drag up the center to center-right for increase contrast in higher frequencies.
This may be a starting point to make the stars "pop", but it doesn't address color shifts or other adjustments you may want to make.