Chapter 8: Moons, Rings, Pluto and beyond

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Chapter 8 Moons, Rings, Pluto and beyond
Triton
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Moons of the solar system 3 categories 7
large (each is distinctive) 12 medium-size
many small (most are captured)
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Jupiter, Up Close, showing two moons in transit
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Jupiter, Callisto, and Europa
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Jupiter and Io
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Jupiter and Ganymede
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Galilean Moons of Jupiter, shown in relative size
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Galilean Moons of Jupiter, relative size, quarter
phase, b/w
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Galilean Moon Orbits
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Galilean Moon interiors are quite distinct from
each other
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Io, the most volcanic object in the solar system,
due to tidal forces between Io, Europa, and
Jupiter
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Io Notice the large ring of volcanic ejecta
around a volcano
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Io
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Io A volcanic plume is seen on the left
limb. The plume is about 150 km high.
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Io A volcanic plume is seen on top . The hot
spot below that is the volcano.
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Io A volcanic eruption is seen in a caldera.
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The New Horizons spacecraft flew by in 2007 and
saw some changes in the volcanic activity on Io.

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A detailed map of Io taken by the New Horizons
spacecraft (June 2007) shows some changes in the
volcanic activity on Io.
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Pictures of Io taken by the New Horizons
spacecraft in Feb-Mar 2007 show moving material
in the plume of the Tvashtar volcano on Io. The
plume is roughly 330 kilometers (200 miles) high.
A hot spot (the volcano) is seen in the night
side at bottom right.
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Europa
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Europa, with an enhanced image on the right
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Europa terrain compared to terrain on the Earth
at a similar scale
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Ganymede
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Ganymede has an icy surface with cracks similar
to those seen on Europa and other moons.
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Ganymede terrain and a flyover animation
generated by computer
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Ganymede has a string of craters that are
probably due to a comet that broke up at it
passed Jupiter, then impacted on Ganymede.
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Callisto
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More detail of the surface of Callisto
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Jupiters Red Spot compared to the sizes of the
four Galilean moons (in a photomontage)