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©2008-2009 ~jirakadarbu
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Orginal Pic can be viewed here:
[link]

A Dangerous Sunrise on Gliese 876d
Illustration Credit & Copyright: Inga Nielsen
(Hamburg Obs., Gate to Nowhere)

Explanation: On planet Gliese 876d, sunrises might be
dangerous. Although nobody really knows what conditions
are like on this close-in planet orbiting variable red dwarf
star Gliese 876, the above artistic illustration gives one
impression. With an orbit well inside Mercury and a mass
several times that of Earth, Gliese 876d might rotate so
slowly that dramatic differences exist between night and
day. Gliese 876d is imagined above showing significant
volcanism, possibly caused by gravitational tides flexing
and internally heating the planet, and possibly more
volatile during the day. The rising red dwarf star shows
expected stellar magnetic activity which includes dramatic
and violent prominences. In the sky above, a hypothetical
moon has its thin atmosphere blown away by the red
dwarf's stellar wind. Gliese 876d excites the imagination
partly because it is one of the few extrasolar planets
known to be close to the habitable zone of its parent star.
---
Pic (c) NASA

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June 5, 2008
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