Open cluster
group of "sibling" stars that are loosely gravitationally bound to one another
C 0607+206
Markarian 50
C 1933+251
Butterfly Cluster
Messier 7
Lagoon Nebula
Wild Duck Cluster
Eagle Nebula
Omega Nebula
Messier 18
Trifid Nebula
Messier 21
Messier 23
Ruprecht 147
Ursa Major Moving Group
Soul Nebula
moving group
Double Cluster
Westerlund 2
Pleiades
Hyades
Messier 25
Messier 26
Messier 29
Messier 34
Messier 35
Messier 36
Beehive Cluster
Messier 37
Messier 38
Messier 39
Messier 41
Messier 46
Messier 47
Messier 48
Messier 50
Messier 52
Messier 67
Messier 93
Messier 103
Westerlund 1
Gould Belt
Heart Nebula
Stock 16
Arches Cluster
Alicante 8
Arp-Madore 2
Gaia 1
R136
RSGC1