One eclipse year is the time needed for:
A)three saros intervals.
B)the line of nodes of the Moon's orbit to go from alignment with respect to the Sun-Earth line to the next identical alignment.
C)365 successive eclipses.
D)two consecutive identical alignments of the Sun, the Moon, and the line of nodes.

Question

Quizplus · Accepted Answer

One eclipse year is the time taken for the line of nodes of the Moon's orbit to return to alignment with respect to the Sun-Earth line. This is because during this time, the Earth completes one revolution around the Sun, and the Moon completes approximately 12.37 orbits around the Earth, causing the line of nodes to move approximately 19.4 degrees due to the precession of the lunar orbit. This is also equivalent to approximately 223 synodic months.

One Eclipse Year Is the Time Needed For