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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

An old galaxy in a young universe

Article Abstract:

Discovery of the 53W091 galaxy that is 3.5 billion years old and has a redshift of 1.5, conflicts with the predictions of the Einstein-de Sitter cosmology model. According to the model, galaxies at that distance and that old, do not exist in the universe. The discovery shows that some galaxies were formed within a billion years of the Big Bang. Data from the Hubble Space Telescope show that 53WO91 probably formed at a redshift of 4 and its stars were formed within 1.5 to 3 Gyr.

Author: Kennicutt, Robert C., Jr.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
Discovery and exploration, Galaxies, Cosmology, Red shift, Redshift, Hubble Space Telescope (Artificial satellite)

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Young spirals get older

Article Abstract:

The observations of the newly formed spiral galaxy have provided the most detailed glimpse of the formation of galaxy similar to the Milky Way and have demonstrated the power of a new generation of high-resolution instruments that use adaptive optics to study the information and evolution of far-off galaxies. The results obtained from studying the young spiral galaxies have accounted for the existence of massive and well-formed galaxies at such early cosmic epochs.

Author: Kennicutt, Robert C., Jr.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
United States, Observatories, Astronomical observatories

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Counter-rotating gaseous disks in the "Evil Eye" galaxy NGC4826

Article Abstract:

Galaxy NGC4826 contains two gaseous disks that are revolving in opposite directions. Analysis of neutral hydrogen emissions indicates that NGC4826, which is comparatively close to Earth and which is known as the Evil Eye or Black Eye galaxy from its form, is the first disk-shaped galaxy found to have this sort of kinematic substructure. The likeliest explanation for this counter-rotation is that NGC4826 formed from the fusion of two separate galaxies.

Author: Braun, Robert, Walterbos, Rene A.M., Kennicutt, Robert C., Jr.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992

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Subjects list: Observations, Spiral galaxies
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