Big sky.The biggest survey of the heavens just got bigger. Covering nearly a quarter of the celestial hemisphere, the Sloan Digital Sky Survey The Sloan Digital Sky Survey or SDSS is a major multi-filter imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico. The project was named after the Alfred P. over the past 5 years has mapped the location and brightness of several hundred million objects. In a new 3-year venture announced on July 11, the survey will examine a slightly larger swath of the northern sky, enabling scientists to study the structure and origin of the Milky Way Milky Way, the galaxy of which the sun and solar system are a part, seen as a broad band of light arching across the night sky from horizon to horizon; if not blocked by the horizon, it would be seen as a circle around the entire sky. . The project will also study distant type 1a supernovas, stellar explosions that have already indicated that a mysterious entity called dark energy is accelerating the expansion of the universe. The extended study will complete Sloan's main mission, to obtain images and distances of I million galaxies and quasars Proper naming of quasars are by Catalogue Entry, Qxxxx±yy using B1950 coordinates, or QSO Jxxxx±yyyy using J2000 coordinates. This page lists quasars.
n. Nautical A device, such as a looped rope, hook and eye, strap, or grommet, used to hold or fasten loose ropes, spars, or oars in position. [Origin unknown.] Noun 1. of the University of Washington in Seattle. Observations of these supernovas may provide clues about the character of dark energy, including its effect on the overall curvature of the universe. |
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