... Centaurus Galaxy Cluster in X Rays . ... Like other immense galaxy clusters, the Centaurus Cluster is filled with gas at temperatures of 10 million degrees or more, making the cluster a luminous source of cosmic x-rays. ... Comet Ikeya Zhang over Tenerife . ... The comet appears.. ... Odyssey Over Mars . ... Taken yesterday from the SOHO spacecraft, this false-color image shows the active Sun near the March Equinox, the beginning of Fall in the south and Spring in the northern hemisphere. ... March ...