Question

2025 astronomy fall final exam (1st semester)
the two points of intersection, where the ecliptic plane crosses the celestial equator, are called:
equinoxes solstices
eclipses prime meridians

Explanation:

To solve this, we analyze each option:

• Equinoxes: These are the two points where the ecliptic (path of the Sun) intersects the celestial equator. This matches the question's description.
• Solstices: These are the points where the Sun is at its maximum declination (farthest from the celestial equator), not intersections. Eliminate.
• Eclipses: These are events (solar or lunar) caused by alignment of celestial bodies, not intersection points. Eliminate.
• Prime meridians: A prime meridian is a line of longitude (on Earth or celestial sphere) defining 0° longitude, not related to ecliptic - celestial equator intersections. Eliminate.

Answer:

A. Equinoxes