Bortle 7: edge of a cityThe edge of a city. Star clusters, the Moon, the planets and bright nebulae are good targets. A dual-band filter helps with emission nebulae.
250 images by 5 photographers.
Most imaged objects from Bortle 7
Challenges for this skyAn image from a Bortle 7 sky counts for these challenges.
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
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