# geometry.ndb, 15 Feb 10

!title geometry

!msgpostfix \n

# The obliquity of the ecliptic changes over time
# 23 26' 21.448" minus 0.468"T
# where T is years since 2000

23.4455        | obliquity of the ecliptic in 2000
0.39787        | sin(obliquity of the ecliptic) in 2000

