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2 changes: 1 addition & 1 deletion skyfield/almanac.py
Original file line number Diff line number Diff line change
Expand Up @@ -146,7 +146,7 @@ def moon_nodes(ephemeris):
moon = ephemeris['moon']

def moon_node_at(t):
"""Return the phase of the moon 0 through 3 at time `t`."""
"""Return True if the Moon is above the ecliptic, else False."""
e = earth.at(t)
lat, _, _ = e.observe(moon).apparent().frame_latlon(ecliptic_frame)
return lat.radians > 0.0
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