... Gamma Ray Burst, Supernova Bump . ... During April and May, attention has been focused on the western evening sky, presenting its spectacle of bright planets and crescent moons shortly after sunset. Meanwhile, the Sun itself has not been just sinking quietly below the horizon. Tail Wags of Comet Ikeya Zhang . ... The star that appears to powers the nebula, although young and bright, does not seem hot enough to create some of the colors observed. ... At the Edge of the Helix Nebula . ...