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Astronomy Picture of the Day
A Great White Spot on Rhea
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#74119
by
[z]Barbara Harris
@
31.05.2005 00:00
- nach oben -
A Great White Spot on Rhea
Explanation:
Why caused this great white spot on the surface of Saturn's moon Rhea?
The spot was first noticed last year by the
robot Cassini spacecraft
now orbiting
Saturn
.
Cassini's flyby of
Rhea
in April
imaged
in the spot in great detail.
Astronomers
hypothesize
that the light-colored spot is the
result of a relatively recent
impact
on the surface of the icy moon.
The impact that likely created the crater also splashed
light-colored material from the interior onto the darker surface.
Rhea
spans 1,500 kilometers across and is the second
largest moon of Saturn after
Titan
.
Rhea sports several other
light colored surface features
that are, as yet, not well understood.
Credit & Copyright