10Jupiter’s Red SpotThe Great Red Spot, a huge storm of swirling gas that has lasted for hundreds of years.Jupiter does not have a solid surface. The planet is a ball of liquid surrounded by gas.
11Moons of JupiterJupiter has four large Galilean moons, twelve smaller named moons and twenty-three more recently discovered but not named moons.We’ll take a look at the four large Galilean moons which were first observed by Galileo in 1610.
12IoIo is the fifth moon of Jupiter. It’s the third largest of Jupiter’s moons.Io has hundreds of volcanic calderas. Some of the volcanoes are active.
13EuropaEuropa is the sixth of Jupiter’s moons and is the fourth largest.It is slightly smaller than the Earth’s moon.The surface strongly resembles images of sea ice on Earth. There may be a liquid water sea under the crust.Europa is one of the five known moons in the solar system to have an atmosphere.
14GanymedeGanymede is the seventh and largest of Jupiter’s known satellites.Ganymede has extensive cratering and an icy crust.
15CallistoCallisto is the eighth of Jupiter’s known satellites and the second largest.Callisto has the oldest, most cratered surface of any body yet observed in the solar system.
16Saturn Saturn is the second largest planet and the sixth from the sun. Saturn is made of materials that are lighter than water. If you could fit Saturn in a lake, it would float!
17Rings of SaturnSaturn’s rings are not solid; they are composed of small countless particles.The rings are very thin. Though they’re 250,000km or more in diameter, they’re less than one kilometer thick.
18UranusUranus is the third largest planet and the seventh from the sun.Uranus is one of the giant gas planets.Uranus is blue-green because of the methane in its atmosphere.
19NeptuneNeptune is the fourth largest planet and the eight from the sun.Because of the orbits, from 1979 to 1999, Neptune was the ninth planet.Like Uranus, the methane gives Neptune its color.
20PlutoPluto is the smallest planet and usually the farthest from the sun.Pluto is the only planet that has not been visited by a spacecraft.