(AGI) Miami, July 23 - Astronomers from NASA's planet-huntingKepler Space Telescope announced the discovery of a 'sibling'Earth, describing it as "something people have dreamed aboutfor thousands of years". The planet, named Kepler 452b, issimilar in size to Earth and is located only 1,400 light-yearsaway in the so-called Goldilocks zone of its solar system,where life is deemed possible thanks to temperatures that areneither too hot or too cold for water to exist. Kepler 452b,NASA said, is the most Earth-like planet ever encountered. Itorbits a star that astronomers have dubbed our Sun's cousin andis 1.5 billion years older than ours, offering scientists aglimpse into Earth's own potential future when our Suneventually dies out. (AGI). .