... Rich star fields and glowing hydrogen gas silhouette dense, opaque clouds of interstellar gas and dust in this Hubble Space Telescope close-up of IC 2944, a bright star forming region in Centaurus, 5,900 light-years away. The largest of these dark globules, first spotted by South African astronomer A. D. Crab Pulsar Wind Nebula . ... Forty years ago, in December of 1968, the Apollo 8 crew flew from the Earth to the Moon and back again. ... Is this coat hanger a star cluster or an asterism? ...