Hi All,
If you want the Ultimate Astrophotography Challenge then go to this link:
Artdeciel.com Astrophotography Challenge
I checked it out - there is a lot of activity on Google when you search ‘Astrophotography Challenge’
It consists of 109 targets (just like Messier) but they’re not just DSOs but Lunar, Planetary and Terrestrial; day and night; northern and southern hemisphere; easy, difficult and impossible!
It includes objects like the ‘Horsehead’, an Aurora, a Total Eclipse of the Sun, the Green Flash, Pluto (shame! On the IAU) and some unusual objects as well.
You can download a PDF of the 109 objects and an accompanying article.
Have a look, perhaps Singastro could organise a Challenge using this list.
It could take someone years to complete!
Clear Skies
Edward Barnard