K2-18 is an exoplanet located about 124 light-years away from Earth in the constellation of Leo. It orbits a red dwarf star known as K2-18, which is smaller and cooler than our Sun. K2-18 is classified as a super-Earth, meaning it is larger than Earth but smaller than gas giants like Neptune. In 2023, scientists discovered that K2-18 has the potential to support liquid water, a key ingredient for life. This finding makes it an exciting target for future studies in the search for extraterrestrial life and understanding planetary atmospheres beyond our solar system.