Question

What is the period over which the basic pattern of eclipses repeats?

1) 18 years 11 and 1/3 days
2) 12 years
3) 24 years
4) 6 years

Answer 1

The basic pattern of eclipses repeats approximately every 18 years 11 and 1/3 days, known as the Saros cycle.

Step-by-step explanation:

The period over which the basic pattern of eclipses repeats is known as the Saros cycle. This cycle is approximately 18 years 11 and 1/3 days. The Saros cycle arises due to the alignment patterns of the Earth, Moon, and Sun, leading to predictable periods of both lunar and solar eclipses. Due to this cycle, after one Saros period has passed, the Earth, Moon, and Sun return to approximately the same relative geometry, and a nearly identical eclipse will occur.