Thursday October 11, 2012 (Jupiter and Saturn; Video Segment - JTTEOTU)
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Transcript of Thursday October 11, 2012 (Jupiter and Saturn; Video Segment - JTTEOTU)
Assignment Currently Open
Summative or
Formative?Date Issued Date Due Date Into
GradeSpeed Final Day
Quiz 6 S1 10/5 10/5 10/19
Recent Events in ScienceStation Crew Opens Dragon’s Hatch
http://www.nasa.gov/mission_pages/station/living/index.htmlRead All About
It!Astronauts in the ISS opened the hatch to the SpaceX Dragon cargo ship on
Wednesday, marking a milestone for the first commercial resupply mission to
reach the International Space Station. Dragon is scheduled to spend 18 days
attached to the station. During that time, the crew will unload 882 pounds of crew
supplies, science research and hardware from the cargo craft and
reload it with 1,673 pounds of cargo for return to Earth. After Dragon’s mission
at the station is completed, the crew will use Canadarm2 to detach Dragon from Harmony on October 28 and release it for a splashdown about six hours later in the Pacific Ocean, 250 miles off the
coast of southern California.
JupiterJupiter is our solar system’s largest
planet, and the most massive: Its 2.5 times more massive than the combined masses of all the planets, moons, and
asteroids.If it had been 10 times more massive, it
would have been a small star and we would live in a binary star system.
Jupiter rotates very rapidly on its axis, slightly less than 10 hours/rotation.This fast rotation causes a slight in Jupiter’s bulged equatorial region.
JupiterJupiter’s atmospheric clouds have a banded appearance. The multicolored bands are aligned parallel to Jupiter’s
equator and are generated by wind systems.
The Great Red Spot in Jupiter’s southern hemisphere is a counterclockwise rotating
cyclonic storm that has been raging for centuries.
JupiterStudies of Jupiter’s structure indicate a gigantic ocean of
gaseous hydrogen extending down far under the cloud tops.
At greater depths, pressure turns the gas to liquid hydrogen.
Halfway down into the interior, extreme pressure causes the liquid hydrogen to turn into a
metallic liquid.Rocky and metallic materials
probably exists in a solid form in the central core… perhaps a large
diamond?
JupiterMoons of JupiterCurrently, Jupiter has 63 known moons. Its four largest moons were discovered by Galileo and are called the Galilean satellites.Each of the Galilean moons has its own unique character.Io is the innermost Galilean moon and is also volcanically active. Europa is the smallest Galilean moon.Ganymede is the largest Jovian satellite.Callisto is the outermost Galilean moon.
EuropaThe apparent youth and smoothness of
Io’s ice-surface have led to the hypothesis that a water ocean exists beneath it,
which could conceivably serve as
an abode for extraterrestrial life.
GanymedeGanymede, the largest
moon in our Solar System, is composed of
approximately equal amounts of silicate
rock and water ice. It is a fully differentiated body with an iron-rich, liquid core. A saltwater ocean is believed
to exist nearly 200 km below Ganymede's surface, sandwiched between layers
of ice.
CallistoCallisto's rotation
is tidally locked to its revolution around Jupiter,
so that the same hemisphere always faces inward. Jupiter appears to stand still in Callisto's
sky. Callisto is less affected by
Jupiter's magnetosphere than the other inner satellites because it orbits farther away.
SaturnSaturn is similar to Jupiter in its atmosphere, composition, and
internal structure.Saturn’s rings are its most
prominent feature - the ring system was discovered by Galileo in 1610.
The rings are very complex, and are composed of orbiting rocks, from
the size of a marble to the size of a house.
The rings are thought to be debris from a shattered moon, but their
origin is still being debated.
SaturnSaturn has a very dynamic
atmosphere - there are large cyclonic storms similar to Jupiter’s
Great Red Spot.Saturn has thirty named moons,
and 62 known at present.The largest Saturnian moon is
named Titan, the second largest moon (after Jupiter’s Ganymede) in
the solar system.Titan has a substantial atmosphere.