Astronomers have discovered what they believe could be a real-life “water world” – a planet completely covered by ocean. Orbiting a star some 100 light years from Earth, the planet is in the so-called “Goldilocks zone” or “habitable zone” where its temperature would be just right for liquid water to exist on the surface. Just like Earth, it would retain its liquid water, as the distance from its star means it isn’t too hot or too cold. Diamonds on Uranus: How it may be raining million-carat jewels on icy planetsNamed TOI-1452 b, the planet is slightly greater in size and mass than Earth, but d…