What's the noun for ecliptics? Here's the word you're looking for.
eclipse
(astronomy) An alignment of astronomical objects whereby one object comes between the observer (or notional observer) and another object, thus obscuring the latter.
Especially, an alignment whereby a planetaryobject (for example, the Moon) comes between the Sun and another planetary object (for example, the Earth), resulting in a shadow being cast by the middle planetary object onto the other planetary object.
A seasonal state of plumage in some birds, notably ducks, adopted temporarily after the breeding season and characterised by a dull and scruffy appearance.
“Once upon a time, I was falling in love, but now I'm only falling apart. There's nothing I can do. A total eclipse of the heart.”
“Nevertheless, it is surprising to learn about the complete eclipse of the government sponsored agricultural research institution in this whole episode.”
A line or dash used to show that text has been omitted
(Irish grammar) A mutation of the initial sound of a word by which voiceless sounds become voiced, voiced stops become nasal consonants, and vowels acquire a prothetic nasal consonant: see Appendix:Irish mutations#Eclipsis.
“It will be observed that the Irish eclipsis is only partially recognised by the Dean.”
“It is termed eclipsis by the Irish grammarians, and is an evidence of a nice attention to euphonia.”
“It will be again observed that the eclipsis is only partially recognised.”
ecliptic
(astronomy) The apparent annual path of the Sun in the sky. More accurately, it is the intersection of the celestial sphere with the plane of the ecliptic, which is the geometric plane containing the mean orbit of the Earth around the Sun. So named because an eclipse can occur only when the Moon lies on this plane.