It is also one of its densest at 5. As a terrestrial planet , it is composed of silicate rock and minerals and is differentiated between an iron core and a silicate mantle and crust. But unlike its peers Venus, Earth and Mars , it has an abnormally large metallic core relative to its crust and mantle.
Combined with its density and size, Mercury has a surface gravity of 3. Like Earth, Mercury and Mars, it is a terrestrial planet, and hence quite dense. In fact, with a density of 5. Its average radius is roughly 6, km And when it comes to mass, the planet weighs in at a hefty 4. Not surprisingly, this is the equivalent of 0.
Combined with its density and size, this means that Venus also has comparable gravity to Earth — roughly 8. Like the other planets of the inner Solar System, Earth is also a terrestrial planet, composed of metals and silicate rocks differentiated between an iron core and a silicate mantle and crust.
Of the terrestrial planets, it is the largest and densest, with an average radius of 6, And at 5. Combined with its size and density, Earth experiences the surface gravity that we are all familiar with — 9.
Mars is the third largest terrestrial planet, and the second smallest planet in our Solar System. Like the others, it is composed of metals and silicate rocks that are differentiated between a iron core and a silicate mantle and crust. But while it is roughly half the size of Earth with a mean diameter of km, or In short, Mars has a mass of 0.
Combined with its size and density — 3. Jupiter is the largest planet in the Solar System. Ganymede orbits around Jupiter with a diameter of 5, kilometers. It is bigger in size than the smallest planet Mercury and would have easily been classified as a planet if it was orbiting the sun. It has its own magnetic field. Its discovery was made by Galileo Galilei the Italian astronomer on January 7, The satellite orbits around Jupiter at a distance of 1,, km and takes 7.
The surface of Ganymede has two types of terrains. It consists of lighter, younger areas and a darker cratered region. Water ice and rocky material make up the planet, and it thought to have underground oceans. The name is derived from a prince in Greek mythology. Titan orbits Saturn and is the second largest moon with a diameter of 5, km.
Christiaan Huygens a Dutch astronomer discovered this moon in It has a dense atmosphere that is similar to that of Earth. It orbits around Saturn in 16 days. The moon has seas and lakes on its surface that are filled with liquid hydrocarbons. It is the only body other than the earth that has water bodies in our solar system. Size : Ganymede's mean radius is 1, miles 2, Although Ganymede is larger than Mercury it only has half its mass, classifying it as low density.
Temperature : Daytime temperatures on the surface average minus degrees Fahrenheit to minus F, and night temperatures drop to C. In , astronomers using the Hubble Space Telescope found evidence of a thin oxygen atmosphere. However, it is too thin to support life as we know it; it is unlikely that any living organisms inhabit Ganymede. Magnetosphere : Ganymede is the only satellite in the solar system to have a magnetosphere. Typically found in planets, including Earth and Jupiter, a magnetosphere is a comet-shaped region in which charged particles are trapped or deflected.
Ganymede's magnetosphere is entirely embedded within the magnetosphere of Jupiter. Ganymede was discovered by Galileo Galilei on Jan. The discovery, along with three other Jovian moons , was the first time a moon was discovered orbiting a planet other than Earth. Galileo's discovery eventually led to the understanding that planets orbit the sun, instead of our solar system revolving around Earth.
Galileo called this moon Jupiter III. When the numerical naming system was abandoned in the mids, the moon was named after Ganymede, a Trojan prince in Greek mythology.
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