The Solar System:. JUPITER. Jupiter. is the 5th planet from the sun is a gas giant has a diameter of 142,984 km (more than 300 times bigger than Earth and more than twice as big as all the rest of the planets added together) is 778,330,000 km from the sun has 39 known satellites.
Using a homemade telescope, Galileo discovered 4 moons revolving around Jupiter in 1610. These moons are known as the Galilean moons: Io, Ganymede, Callisto, and Europa. This was important evidence that the earth was not the center of the solar system.
1st spacecraft to pass asteroid belt
found intense radiation around Jupiter
measured solar wind, Jupiter’s magnetic field and atmosphere
investigated atmospheres and moons
found Jupiter;s rings
found volcanoes on Io
found frozen crust on Europa
1st spacecraft to orbit a gas planetExploration of Jupiter
Jupiter -has a core of rocky material
Above the core lies the main bulk of the planet in the form of liquid metallic hydrogen
Mean distance from the Sun: 5.203 AU (778,400,000 km/483,700,000 mi)
Length of Year: 11.86 Earth years
Rotation Period: 9.92 hours
Mean Orbital Velocity: 13.06 km/s (8.1 mi/s)
Inclination of Axis: 3.12° Diameter: 142,980 km/88,700 mi
Europa is the 4th largest moon and has a smooth frozen crust. There may be liquid water under it.
Io is the third largest moon It has active volcanoes.
Ganymede is the
largest moon in
the solar system.
Callisto is the second largest moon and is almost as big as Mercury.