(1) A lunar eclipse occurs at full moon when the Moon crosses the ecliptic in opposition to the Sun.

(2) The required coincidence of a conjunction with the ecliptic crossing of Venus has some latitude because the solar disc is so much bigger than the image of Venus.

(3) Comets in this group, called the Jupiter family comets, revolve around the Sun near the plane of the ecliptic in the same direction as Earth's orbit.

(4) There are also tables which give transformations between different coordinate systems on the celestial sphere, in particular allowing ecliptic coordinates to be transformed into equatorial coordinates.

(5) The other planets though also move across the sky on paths close to the ecliptic .

(6) The Moon's Nodes are points in space representing the points where the moon's orbit around the earth crosses the ecliptic .

(7) An eclipse occurs only if the Moon crosses the ecliptic when very close to either conjunction or opposition, respectively producing solar and lunar eclipses.

(8) Second, and more significant, eclipses do not necessarily occur precisely on the node, but rather there is a range of possible positions called the ecliptic limits.

(9) Lunar eclipses occur at the time of a Full Moon, and when the Moon is near one of the nodes of intersection between its orbit and the ecliptic plane.

(10) Another eight years later the node has moved beyond the ecliptic limit, and no transit can take place.