This size and scale of the Kepler-452 system compared alongside the Kepler-186 system and the so...
Kepler-452b's star is apparently older than the sun — 6 billion years, compared to 4.5 billion years. It's thus in a more energetic phase of its life cycle than the sun is; indeed, the star is about 10 percent larger and 20 percent brighter than Earth's sun. (That means the sunli...