11. Some of the
rings of
Uranus,
discovered by
the Viking
spacecraft
12. Rings of the planet
Uranus, with two
shepherd moons which
keep the ring particles in
place, discovered by the
Viking spacecraft
13. Continuous
distribution of
small particles
throughout
the ring
system of
Uranus.
Picture taken
while the
Viking
spacecraft
was in the
shadow of
Uranus. These
dust lanes
were
previously
unknown. 96
second
exposure,
hence,
background
stars form
streaks.
14. Epsilon ring of Uranus,
and three of the moons
discovered by the
Viking spacecraft
17. 5 km high scarp on Miranda – Miranda may have split apart and reassembled
18.
19. 50 km wide “chevron” on Miranda indicates complex history
20. Ariel – 1,160 km in diameter; shows many tectonic features
21. Umbriel - 1,168 km in diameter
Resolution of this Viking
image is ~ 10 km. Umbriel
is highly cratered,
particularly on its
southern hemisphere
(right). It is the darkest
moon of Uranus, with an
albedo of ~ 16 %, like our
moon. It also is the moon
with lowest internally-
generated geologic
activity. The bright spot
at the top of the image
(near the equator) may be
frost.
22. Titania – 1,580 in diameter; heavily cratered but also has long
scarps
23. Oberon – 1,520 km in diameter; bright surface markings, many impact
craters
