New sights in the high-energy sky
Article Abstract:
Surprising revelations about the gamma-ray sky have been made by NASA's Compton Gamma Ray Observatory. Further evidence is presented for gamma-ray lines, over 100 point sources have been located and a shower of antimatter is reported way above the Milky Way. The gamma-ray sky has been fully mapped to the mega-electron volts regime from -10 giga-electron volts, with the entire spectral area dominated by light from the Milky Way. Gamma radiation is identified from over 50 active galaxies, while radio pulsars have been used to locate a subset of gamma-ray sources.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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US astronomers contest building project
Article Abstract:
Astronomers are opposed to a commercial development at the foot of Mount Hopkins in southern Arizona, which could cause light pollution that may degrade viewing conditions at the Whipple Observatory and the Multiple Mirror Telescope (MMT), as well as other facilities. Developer, Fairfield Homes, has threatened to bring legal action against the astronomers if they continue speaking out against the project. A planning consultant has claimed that Fairfield is committed to producing no more light pollution than expected from the already approved plans for homes.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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