SETI bioastro: Galactic Habitable Zones?

From: Larry Klaes (lklaes@bbn.com)
Date: Fri Apr 14 2000 - 13:38:57 PDT


10 April 2000: Barren galaxies, Nature

"[Guillermo] Gonzalez and colleagues have now proposed that entire
galaxies, which contain millions of stars, also have habitable zones,
beyond whose boundaries life - or, at least, advanced life - can't get
a foothold. They say that the habitable zone of a spiral galaxy (like
the Milky Way) may encircle its centre, just as the habitable zone of
the solar system encircles the Sun. Inside or outside this band, a
galaxy is sterile."

http://helix.nature.com/nsu/000413/000413-4.html

See also this online May, 1999 article from Scientific American:

http://www.sciam.com/1999/0599issue/0599scicit1.html



This archive was generated by hypermail 2b30 : Wed Mar 28 2001 - 16:07:53 PST