... Dense fields of stars laced with dark lanes of dust crowd this region only a few degrees from the center of our Galaxy. ... Mercury, the closest planet to the Sun, remains the most mysterious of the Solar System's inner planets. ... A solar storm overtook the Earth on August 26th. ... Red stars are cool, around 3,000 kelvins (K), while blue stars are hotter and can have temperatures over 30,000 K. Our own lovely yellow Sun's temperature is a comforting 6,000 K. [ First page ] Prev. ...