New technique for sifting data from NASA's Kepler planet-hunting mission nearly doubles the number of confirmed planets so far. Of the new batch of 715, only four have certain Earth-like characteristics.
An X4.9-class solar flare that erupted Monday is so far the strongest this year. The bright flash of light was seen from the Earth, but the material ejected from the sun will most likely not reach our planet.
Until now, researchers have had to rely on computer simulations to explain what happens moments before the blast that rips a star apart. But NASA's orbiting X-ray observatory NuSTAR lets scientists glimpse conditions at star's core.