Which planet is called Earth 2.0?

 There are several exoplanets that have been dubbed "Earth 2.0" by scientists and the media because of their similarities to our own planet in terms of their size, distance from their host star, and potential habitability.

One such planet is Kepler-438b, which was discovered by NASA's Kepler spacecraft in 2015. It is located about 640 light-years away from us and is only slightly larger than Earth, with a similar distance from its star. It is also located in the habitable zone of its star, where conditions could potentially support liquid water on its surface.

Another exoplanet that had been called Earth 2.0 is Kepler-452b, which was discovered in 2015 and is about 1,400 light-years away from us. It is also located in the habitable zone of its star and is about 60% larger than Earth.

However, it is important to note that even though these exoplanets may have some similarities to Earth, they are still very different from our planet in many ways, and we do not yet know whether they actually support life. Further research and exploration are needed to determine whether these planets are truly habitable