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Astronomy Picture of the Day
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zorg.ch
#105558
by
[z]Barbara Harris
@
12.02.2008 00:00
- nach oben -
Credit:
Explanation:
How did Epimetheus form?
No one is yet sure.
To help answer that question,
this small moon has recently been imaged again in great detail by the
robot spacecraft Cassini
now orbiting
Saturn
.
Epimetheus
sometimes
orbits
Saturn in front of
Janus
,
another small satellite, but sometimes behind.
The
above image
,
taken last December,
shows a
surface covered with craters
indicating great age.
Epimetheus
spans about 115 kilometers across.
Epimetheus
does not have enough
surface gravity
to restructure itself into a
sphere
.
The flattened face of
Epimetheus
shown
above
might have been created by a
single large impact
.
digg_url = 'http://apod.nasa.gov/apod/ap080211.html'; digg_skin = 'compact';
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