CooC - Coordinate Conversions (version 3.0)
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Galactic coordinate system
For studies of more distant galactic objects or somewhat closeby
extragalactic objects, a natural reference plane is the plane of the
Milky Way. Since the Sun lies very close to that plane, we can put the
origin at the Sun.
Galactic longitude, l, is measured counterclockwise from the direction
of the centre of the Milky Way (in Sagittarius, R.A. = 17h 45.7min,
dec. = -29 deg). The values are between 0 and 360 degrees in decimal
format (degrees).
Galactic latitude, b, is measured from the galactic plane, positive
northwards and negative southwards. The values are between -90 and +90
degrees in decimal format (degrees).
For more information on different coordinate systems, please check
the corresponding
encyclopædia article.
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