SETI bioastro: More evidence of a subsurface ocean on Ganymede and a new protoplanet disk found

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From: Larry Klaes (larry.klaes@incent.com)
Date: Thu May 31 2001 - 10:14:11 PDT


http://www.astrobiology.com/
25 May 2001: Hydrated Salt Minerals on Ganymede's Surface: Evidence of an
Ocean Below <http://www.sciencemag.org/cgi/content/abstract/292/5521/1523>,
Science, [summary - can be viewed for free once registered
<http://www.sciencemag.org/subscriptions/howto.shtml>. A subscription fee is
required for full access.]
"Reflectance spectra from Galileo's near-infrared mapping spectrometer
(NIMS) suggests that the surface of Ganymede, the largest satellite of
Jupiter, contains hydrated materials. These materials are interpreted to be
similar to those found on Europa, that is, mostly frozen magnesium sulfate
brines that are derived from a subsurface briny layer of flui"

25 May 2001: Evidence for a Solar System-Size Accretion Disk Around the
Massive Protostar G192.16-3.82
<http://www.sciencemag.org/cgi/content/abstract/292/5521/1513>, Science,
[summary - can be viewed for free once registered
<http://www.sciencemag.org/subscriptions/howto.shtml>. A subscription fee is
required for full access.]
"The observations provide evidence for a true accretion disk that is about
the size of our solar system and located around a massive star. A model of
the radio emission suggests the presence of a binary protostellar system.
The primary protostar, G192 S1, at the center of the outflow, with a
protostar mass of about 8 to 10 times the solar mass, is surrounded by an
accretion disk with a diameter of 130 astronomical units (AU). The companion
source, G192 S2, is located 80 AU north of the primary source. "


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