Summary:
- Astronomers have discovered that the exoplanet K2-18b, located about 110 light-years from Earth, is a "super-Earth" that may be a water-rich ocean planet.
- K2-18b is about twice the size of Earth and orbits a red dwarf star, which is smaller and cooler than our Sun. The planet's atmosphere contains water vapor, which suggests it could have liquid water on its surface.
- The discovery of water on K2-18b increases the chances that it could be a habitable world, as liquid water is considered a key ingredient for life as we know it. Further observations and research will be needed to determine if K2-18b truly has the right conditions to support life.