What are the two points where the ecliptic crosses the celestial equator known as?

What are the two points where the ecliptic crosses the celestial equator known as?

• A. Solstices
• B. Equinoxes
• C. Zeniths
• D. Apexes

Answer: (B)

The two points where the ecliptic crosses the celestial equator are known as equinoxes. This phenomenon occurs when the Sun appears directly above the equator, leading to nearly equal lengths of day and night. The equinoxes happen twice a year: the vernal equinox in March and the autumnal equinox in September.

Other terms mentioned, such as solstices, refer to the points in the year when the Sun reaches its highest or lowest point in the sky at noon, marking the longest and shortest days. Zeniths relate to the highest point in the sky directly overhead and have no connection to the celestial equator or ecliptic crossing. Apexes generally refer to a peak or summit, which also does not apply in this context. Therefore, the term equinoxes accurately describes the specific celestial event of the intersection of the ecliptic and celestial equator.