Pleiades Comparison Table

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Pleiades comparison table

Subject has purpose is part of is a kind of has catalog has number of star is an instance of has synonym has definition has distance has age has composition has Messier number

Messier object originally to catalog all objects which could be confused with a comet celestial sphere celestial body Messier catalog an object assigned a number by Charles Messier from Earth

naked eye object physical object a physical object visible to the unnaided human eye

open cluster disk star cluster open cluster catalog 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.) varies widely

Pleiades originally to catalog all objects which could be confused with a comet disk open cluster catalog several hundred Messier object NGC 1432 125 pc very young B star, late star 45

Subject	has purpose	is part of	is a kind of	has catalog	has number of star	is an instance of	has synonym	has definition	has distance	has age	has composition	has Messier number
Messier object	originally to catalog all objects which could be confused with a comet	celestial sphere	celestial body	Messier catalog				an object assigned a number by Charles Messier	from Earth
naked eye object			physical object					a physical object visible to the unnaided human eye
open cluster		disk	star cluster	open cluster catalog				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.)		varies widely
Pleiades	originally to catalog all objects which could be confused with a comet	disk		open cluster catalog	several hundred	Messier object	NGC 1432		125 pc	very young	B star, late star	45

Next Messier object: Praesepe Up: Messier object, naked eye object, open cluster Previous Messier object: Pinwheel galaxy