The Sun reaches its southernmost point, the Ursid meteor shower peaks, and the Christmas Tree Cluster glitters in the sky ...

On Monday (Jan. 8), astronomers reported that RW Cephei, a hypergiant star in the constellation Cepheus about 16,000 light-years from Earth, has recently begun brightening after dimming "very ...

located at about 10,000 light-years away in the Cepheus constellation. Formed from expanded shells of gases, the nebula is powered by two massive stars, each with a mass over 20 times greater than ...