Compare and contrast the atmospheres and weather systems of Saturn and
Jupiter, and tell how the differences affect each planets appearance.
Large and violent storms are present on both Saturn and Jupiter (Jupiters storm is
more constant), but the total t
Therefore the Moon and Mercury have such weak gravitational fields that they can
not keep an atmosphere. Since anything that moves away from a gravitating body
with more than the escape speed will never return, they will never obtain an
What is the cause of Ios volcanic activity?
The real source of Ios energy is gravity
- Jupiters gravity. Io orbits very close to Jupiter and as a result, Jupiters huge
gravitational field exerts strong tidal forces on the moon.
What evidence do we have fo
Astronomers have found indirect evidence for embedded moonlets, in the form of
wakes that they leave behind them in rings.
What affect does Mimas have on Saturns rings?
The effect of the resonance with Mimas is that particles in the division receive a
During Saturns summer and winter, the rings are at their brightest.
During its spring and fall, the rings almost disappear all together.
What is a ring crossing?
When will the next one occur?
A ring crossing occurs in Spring and Fall when the rings are cl
Give a brief description of Earths magnetosphere, and tell how it was
Earths Magnetosphere: the region surrounding Earth wherein particles from the solar
wind are trapped by Earths magnetic field.
It was discovered by artificial satellites lau
Describe the theory of the Moons origin favored by many astronomers.
postulates a collision by a large Mars-sized object with a youthful molten Earth.
This collision is presumed to have been more a glancing blow than a direct impact.
The Earths oceans undergo the greatest deformation, because liquid can most easily
move around on our planets surface.
The daily tides we experience result as Earth rotates beneath this deformation.
Is the greenhouse effect operating in Earths atmosphere
The source of Jupiters excess energy is the slow escape of gravitational energy
released during the planets formation.
As the planet took shape, some of its gravitational energy was concerted into heat in
What is Jupiter thought to be like b
Also, the mission expanded our knowledge of these small, but complex, worlds still
What is the Great Red Spot?
What is known about the source of its energy?
The Great Red Spot
is a region of swirling circulating winds, rather like a whirlpool or