Zodiacal light is a celestial phenomenon characterized by a faint band of light that can be observed in the night sky. This band of light is believed to result from sunlight reflecting off cometary dust particles that are concentrated in the plane of the zodiac, also known as the ecliptic. The zodiacal light is most easily visible in the tropics, where the ecliptic is nearly vertical, and it can be seen in the western sky after twilight and in the eastern sky before dawn.