Define loci and eclipse ?

Loci: Loci is a term used in mathematics to refer to a set of points that satisfy a particular condition or set of conditions. In geometry, loci are often used to describe the path traced out by a point or set of points as they move according to certain rules or constraints.

Eclipse: An eclipse is an astronomical event that occurs when one celestial body moves into the shadow of another celestial body. The most common types of eclipses are solar eclipses, where the Moon passes between the Earth and the Sun, and lunar eclipses, where the Earth passes between the Sun and the Moon. During a solar eclipse, the Moon blocks out the Sun's light, casting a shadow on the Earth, while during a lunar eclipse, the Earth blocks out the Sun's light, causing the Moon to appear darkened.