What are 5 facts about Ganymede?
Below are some more interesting facts about Ganymede:
- – Ganymede is named after a Trojan prince.
- – Ganymede should be a planet, but isn’t.
- – Ganymede has an orbital period of 7.1 days.
- – Ganymede has its own magnetic field.
- – Ganymede may have a buried ocean.
- – Ganymede has an atmosphere.
- – Ganymede is made of rock and ice.
What do Io Ganymede and Europa have in common?
Io’s Elliptical Orbit Ganymede, Europa and Io are all in orbital resonance with Jupiter. Io completes exactly four orbits and Europa completes exactly two orbits in the same time it takes Ganymede to complete one orbit around Jupiter.
What are 3 interesting facts about Ganymede?
Facts about Ganymede
- Age: Ganymede is about 4.5 billion years old, about the same age as Jupiter.
- Distance from Jupiter: Ganymede is the seventh moon and third Galilean satellite outward from Jupiter, orbiting at about 665,000 miles (1.070 million kilometers).
- Size: Ganymede’s mean radius is 1,635 miles (2,631.2 km).
What are 3 interesting facts about Callisto?
Below are some more interesting facts about Callisto:
- – Callisto is named after a mistress of Zeus.
- – Callisto is 99% as big as Mercury.
- – Callisto orbits Jupiter in 16.7 days.
- – Callisto should be a planet, but isn’t.
- – Callisto has the most craters in the solar system.
- – Callisto consists of rock and ice.
What is special about Callisto?
Callisto is Jupiter’s second largest moon and the third largest moon in our solar system. Its surface is the most heavily cratered of any object in our solar system. Images of Callisto captured by passing spacecraft show bright white spots standing out against darker regions.
What is Callisto made of?
Callisto is composed of approximately equal amounts of rock and ices, with a density of about 1.83 g/cm3, the lowest density and surface gravity of Jupiter’s major moons. Compounds detected spectroscopically on the surface include water ice, carbon dioxide, silicates, and organic compounds.
What would Callisto and Ganymede have in common?
Ganymede and Callisto are similar in size and are made of a similar mixture of ice and rock, but data from the Galileo and Voyager spacecraft show that they look different at the surface and on the inside.
What is interesting special about the moons Io Ganymede and Europa?
Though they are all of similar sizes—about one-fourth of Earth’s radius—the four moons are diverse: Io is violently volcanic, Europa is encrusted in ice, Ganymede has a magnetic field, and Callisto is pockmarked with ancient craters.
Is Callisto a gas giant?
Atmosphere. Scientists announced in 1999 that the Galileo spacecraft detected a very thin carbon dioxide exosphere—an extremely thin atmosphere—on Callisto during its observations in 1997. More recent research indicates Callisto also has oxygen and hydrogen in its exosphere.
Is Callisto hot or cold?
Temperature: The mean surface temperature of Callisto is minus 218.47 degrees Fahrenheit (minus 139.2 Celsius).
Why is Io called Io?
It is just slightly larger than Earth’s moon. Io is named after a maiden who was loved by Zeus. In the Greek myth, Zeus turned her into a heifer in an attempt to hide her from his jealous wife, Hera. Io was discovered by Galileo Galilei and Simon Marius in 1610 and is one of the four Galilean satellites.
What is Ganymede made of?
Structure. Ganymede has three main layers: A metallic iron core at its center, a spherical shell of rock (mantle) surrounding the core, and a spherical shell of mostly ice surrounding the rock shell. The surface is the very top of the ice shell. Scientists have discovered irregular lumps beneath Ganymede’s icy surface.
What is Europa made of?
From ground-based telescopes, scientists knew that Europa’s surface is mostly water ice, and scientists have found strong evidence that beneath the ice crust is an ocean of liquid water or slushy ice.
How did Io Europa Ganymede and Callisto form?
How did the Galilean moons form? It is thought that Jupiter’s largest moons Io, Europa, Ganymede and Callisto most probably formed out of material leftover from the formation of Jupiter itself. Like the rest of the Solar System planets, Jupiter formed out of the disc of dust and gas surrounding the young Sun.
Is Europa and Callisto older?
The dark regions may be around 4.2 billion years old, while the lighter, grooved areas only 2 – 3.6 billion years old. If one compares the crater distributions on Ganymede to those on Europa and Callisto, one sees that Europa’s surface is far younger, while Callisto’s is slightly older.
Is there oxygen on Callisto?
What is Io made of?
While Io’s exact composition is unknown, it is likely molten sulfur and its compounds or silicate rock, according to NASA (opens in new tab). Additionally, the moon’s thin atmosphere is primarily composed of sulfur dioxide.
How cold is Io?
about minus 202 degrees Fahrenheit
Temperature: Io’s surface temperature averages about minus 202 degrees Fahrenheit (minus 130 degrees Celsius), resulting in the formation of sulfur dioxide snowfields. But Io’s volcanoes can reach 3,000 degrees F (1,649 degrees C). Io is often referred to as a celestial body of fire and ice.
How old is Io?
Age: Io is about 4.5 billion years old, about the same age as Jupiter. Distance from Jupiter: Io is the fifth moon from Jupiter. Its average orbital distance is about 262,000 miles (422,000 km). Io takes 1.77 Earth-days to orbit Jupiter.