A year in News... ...and Pictures: April 2006 – March 2007

  • Martin Ratcliffe
Part of the Springer Praxis Books book series (PRAXIS)


Astronomers have found that spiral galaxies are not randomly oriented in space. They appear to be preferentially aligned. The dramatic results come from a careful study of two huge galaxy surveys, the Sloan Digital Sky Survey and the Two-Degree Field Galaxy Redshift Survey, combined with precise locations of known voids, large spaces lacking in bright galaxies.


Black Hole Dark Matter White Dwarf Hubble Space Telescope Dwarf Galaxy 


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Copyright information

© Praxis Publishing Ltd. 2008

Authors and Affiliations

  • Martin Ratcliffe

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