What is another word for celestial equator?
Pronunciation: [səlˈɛstjə͡l ɪkwˈe͡ɪtə] (IPA) 
The term "celestial equator" refers to an imaginary circle in the sky that is perpendicular to the Earth's axis. It marks the point where the plane of the Earth's orbit intersects with the celestial sphere, defined as the visible sky. There are several synonyms for the term, including "equinoctial line," "equator of the heavens," and "zero declination circle." These terms are often used interchangeably in astronomy and navigation, as they all refer to the same concept of a line in the sky that divides it into two equal parts. Understanding the celestial equator is important for locating celestial objects, such as stars and planets, in the sky.
