ChallengesObserving lists to complete with your own images. Tag the objects in your images, and your progress counts at once.
Classic lists
Herschel 400400 objects from William Herschel's catalog, chosen by the Ancient City Astronomy Club.400 objects
O'Meara's Hidden TreasuresStephen James O'Meara's 109 deep-sky objects that are not in the Messier or Caldwell lists.109 objects
The 10 brightest nebulaeThe 10 nebulae with the lowest magnitude of the nebula itself: emission, reflection and planetary nebulae, supernova remnants and clusters with nebula. Dark nebulae have no magnitude.10 objects
City skiesWith a smart telescope you can take good images from a city. In these challenges only images from a Bortle 7, 8 or 9 sky count.
City starter from Bortle 7+Bortle 7+The 10 brightest Messier objects north of declination -19°. From Europe and North America they rise high above the horizon. Only images from a sky of Bortle class 7, 8 or 9 count.10 objects
City starter from Bortle 8+Bortle 8+The 10 brightest Messier objects north of declination -19°. From Europe and North America they rise high above the horizon. Only images from a sky of Bortle class 8 or 9 count.10 objects
Messier from Bortle 7+Bortle 7+The 110 objects of Charles Messier's catalog, from a city sky. Only images from a sky of Bortle class 7, 8 or 9 count.110 objects
Messier from Bortle 8+Bortle 8+The 110 objects of Charles Messier's catalog, from a city sky. Only images from a sky of Bortle class 8 or 9 count.110 objects
From the communityChallenges that users made. Give a +1 to a challenge you like. Top: most +1 first, then most users who joined.
Total solar eclipse Challenge
by MikerPlusCatch the entire eclipse, from first contact to last3 objects
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