SpaceX launches NASA planet-hunting satellite
In a modest mission with the grandest of intentions, a SpaceX Falcon 9 rocket launched a planet-hunting satellite for NASA Wednesday that will measure the light from millions of stars, on the lookout for indications of Earth-like, potentially habitable worlds scattered across the nearby Milky Way. Building on the legacy of NASA’s trail-blazing Kepler mission, which showed that exoplanets are…