... Comet Hyakutake and the Milky Way . ... Two years ago, the Great Comet of 1996, Comet Hyakutake, inched across our northern sky during its long orbit around the Sun. ... Doomed Star Eta Carinae . ... Eta Carinae may be about to explode. But no one knows when - it may be next year, it may be one million years from now. ... The Dunes Of Mars . ... Hot gas dances across the surface of the Sun in this picture from the orbiting TRACE satellite. ... Shapley 1: An Annular Planetary Nebula . ...