Twice per year,when day and night are equal in length,the Sun is at one of two positions in the sky known as equinoxes.These points are the intersections of which two planes in the sky?
A) the celestial equator and the ecliptic
B) the celestial meridian and the celestial equator
C) the ecliptic and the celestial meridian
D) the ecliptic and the arctic circle

Question

Quizplus · Accepted Answer

The two planes in the sky that intersect at the equinoxes are the celestial equator (an imaginary line projected onto the sky that divides the celestial sphere into northern and southern hemispheres) and the ecliptic (the apparent path of the Sun on the celestial sphere, which is tilted at an angle of about 23.5 degrees with respect to the celestial equator).

Twice Per Year,when Day and Night Are Equal in Length,the