Old galactic coordinate system - a simple definition<BR>
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Old galactic coordinate system was identical to the <a href="CooC6help.html">
(new) galactic coordinate system</a> in all respects except that its zero 
point was at the intersection of the equator and the galactic plane. To 
differentiate old and new galactic systems from each other, symbols l(I) and 
b(I) are used for the old coordinates. For the new coordinates l(II) and 
b(II) were used during the transition phase (in 1960s) - nowadays new 
galactic coordinates are knows just as l and b.<BR>
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