I1S1O1P3H4O1T1E1
13 points
ISOPHOTE is validvalid
a curve on a chart joining points of equal light intensity
a line on an image of a galaxy, nebula or other celestial object connecting points of equal light intensity from a given source
a curve on a chart joining points of equal light intensity
a line on an image of a galaxy, nebula or other celestial object connecting points of equal light intensity from a given source