Kepler-452b: Earth's Bigger, Older Cousin

NASA will host a news teleconference at noon EDT Thursday, July 23 to announce new discoveries made by its planet-hunting mission, the Kepler Space Telescope. The first exoplanet orbiting another star like our sun was discovered in 1995. Exoplanets, especially small Earth-size worlds, belonged within the realm of science fiction just 21 years ago. Today, and thousands of discoveries later, astronomers are on the cusp of finding something people have dreamed about for thousands of years -- another Earth.