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physical object > natural object > celestial body > collection of stars > association > OB association > Scorpius OB1

Scorpius OB1 comparison table

Subject	is part of	is a kind of	is an instance of	has definition	has distance
OB association		association		A loose gathering of O and B stars that typically stretches over hundreds of light-years and contains a few dozen OB stars.
Scorpius OB1	Scorpius		OB association	An extremely young association of OB stars.	2 kpc

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