According to Science, Kepler-452b is estimated to have five times the mass of Earth, with twice the gravity. “It’s awe-inspiring to consider that this planet has spent 6 billion years in the habitable ...

The following year, continuing analysis turned up Kepler-452b, only 60% larger in diameter than Earth and likely rocky, was discovered orbiting in the habitable zone of a G-class (yellow ...

From left: Kepler-22b, Kepler-69c, Kepler-452b, Kepler-62f, Kepler-186f and Earth. | Credit: NASA/Ames/JPL-Caltech As astronomers delve deeper into the diversity of worlds orbiting distant stars ...

That is, until now. Kepler 452b will forever be remembered as the first, second Earth or what NASA refers to as "Earth 2.0" ever discovered: Here's what we know so far about this Earth 2.0 ...