Here's why:
* Zodiacal Constellations: Leo is a zodiac constellation, meaning it lies along the ecliptic, the apparent path of the sun across the sky.
* Earth's Tilt: Due to the tilt of the Earth's axis, the constellations visible in the northern hemisphere are different from those visible in the southern hemisphere.
* Northern Hemisphere Constellation: Leo is a constellation primarily visible in the northern hemisphere during the spring months (March-May).
While you might be able to see a small portion of Leo very close to the horizon in the extreme southern parts of the hemisphere, it's generally considered a northern hemisphere constellation.
