OB Associations

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Nearby Milky Way OB associations, from Melnik et al, Astronomy Letters 21, pp 10-26, 1995. The image painted on the base grid is the relevant 22.5 kly x 22.5 kly section of the NASA/JPL-Caltech Milky Way map. The smallest circle around the Sun has a radius of 750 light years. The two larger circles around the Sun have radii of 5,000 and 10,000 light years. The base grid parallels the galactic plane, and lies 0.70 thousand light years (700 light years) below the actual galactic plane. The OB Associations lie along the Scutum-Centaurus Arm, the Sagittarius Arm, the Orion Spur, and the Perseus Arm.

Click here for a table of the data used to generate this view.


Star Clusters and Nebulae