The imaginary circle on the celestial sphere that is directly over the equator, marking the transition between day and night.

सम विषुवcircle (equinoctial circle)

English Usage: The equinoctial circle divides the earth into the northern and southern hemispheres.

Hindi Usage: सम विषुवcircle पृथ्वी को उत्तरी और दक्षिणी गोलार्धों में विभाजित करता है।