The Tropic of Capricorn is an imaginary line that encircles the Earth, approximately 23.5 degrees south of the equator.
It marks the southernmost point where the Sun can be directly overhead during the summer solstice in the Southern Hemisphere.
In other words, itt is the southern boundary of the tropical zone, where the Sun is highest in the sky and days are longest.
This line has an impact on the climate and the distribution of seasons in nearby regions and is an important reference for geography and astronomy.