An interesting article by Lee Pullen titled "Life on Frosted Earths"
http://astrobio.net/news/modules.php?op=modload&name=News&file=articl...
Their summary
"Extrasolar Life Summary (Jan 28, 2008): The search for life beyond
the Earth is closely linked with hunting for habitable worlds.
Astronomers have always hoped to find planets in the so-called
"Goldilocks zone" around their parent stars, where the temperature is
just right."
This article points to the research of a Professor Siegfried Franck
and a team of climate researchers who have modeled that habitable
zones on planets can be extended outward a considerable amount.
Seeking the non-Earthers, Jason H.