Gibbous Europa
Explanation:
Although the
phase
of this moon might appear familiar, the moon itself might not.
In fact, this
gibbous phase shows
part of
Jupiter's moon
Europa.
The robot spacecraft
Galileo captured
this image mosaic during its
mission orbiting Jupiter from 1995 - 2003.
Visible are
plains of
bright ice,
cracks that run to the horizon, and
dark patches
that likely contain both ice and dirt.
Raised terrain is
particularly apparent near the
terminator,
where it casts
shadows.
Europa is nearly the same size as
Earth's Moon, but much smoother, showing few
highlands or
large impact craters.
Evidence and images from the
Galileo spacecraft,
indicated
that liquid oceans
might exist below the icy
surface.
To test speculation that these seas hold life, NASA and
ESA have
started preliminary development of the
Europa Jupiter
System Mission, a
spacecraft proposed for
launch around 2020 that would further explore Jupiter and in particular Europa.
If the surface ice is thin enough, a future mission might drop
hydrobots
to burrow into the oceans
and search for life.
Browse:
See the latest images submitted to APOD
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.
