NGC 1818 Comparison Table

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physical object > natural object > celestial body > collection of stars > star cluster > open cluster > NGC 1818

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NGC 1818 comparison table

Subject is a kind of is an instance of has image has definition has distance

open cluster star cluster A comparatively loose grouping (mass range 10²-10³ M)_sun of Population I stars, strongly concentrated in the spiral arms or the disk of the Galaxy (in fact, open clusters give a good indication of where the spiral arms are). Unlike associations, open clusters are dynamically stable. Depending on their age, stars in open clusters "peel off" from the main sequence at different points (the higher the turnoff point, the younger the cluster). (Sometimes called Galactic cluster; NGC 188 is the oldest known open cluster.)

NGC 1818 open cluster 164000 light years

Subject	is a kind of	is an instance of	has image	has definition	has distance
open cluster	star cluster			A comparatively loose grouping (mass range 10²-10³ M)_sun of Population I stars, strongly concentrated in the spiral arms or the disk of the Galaxy (in fact, open clusters give a good indication of where the spiral arms are). Unlike associations, open clusters are dynamically stable. Depending on their age, stars in open clusters "peel off" from the main sequence at different points (the higher the turnoff point, the younger the cluster). (Sometimes called Galactic cluster; NGC 188 is the oldest known open cluster.)
NGC 1818		open cluster			164000 light years

Next open cluster: NGC 1850 Up: open cluster Previous open cluster: Hyades