Europa and Ganymede each have
an iron- rich core; a rock envelope around the core; a thick, soft ice layer; and a thin crust of impure water ice
. Layering at Callisto is less well defined and appears to be mainly a mixture of ice and rock.
What is Ganymede structure?
Ganymede
has three main layers. A sphere of metallic iron at the center (the core, which generates a magnetic field), a spherical shell of rock (mantle) surrounding the core, and a spherical shell of mostly ice surrounding the rock shell and the core.
What is the structure of Europa?
Structure. Like our planet, Europa is thought to have
an iron core, a rocky mantle and an ocean of salty water
. Unlike Earth, however, Europa’s ocean lies below a shell of ice probably 10 to 15 miles (15 to 25 kilometers) thick and has an estimated depth of 40 to 100 miles (60 to 150 kilometers).
What is Europa Ganymede?
The Galilean moons (or Galilean satellites) /ɡælɪˈliːən/ are the
four largest moons of Jupiter
—Io, Europa, Ganymede, and Callisto. They were first seen by Galileo Galilei in December 1609 or January 1610, and recognized by him as satellites of Jupiter in March 1610.
What do Io Ganymede and Europa have in common?
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.
Can we breathe on Europa?
Europa has a thin oxygen atmosphere, but
it is far too tenuous for humans to breathe
. From the surface of Europa, Jupiter appears 24 times larger than the moon appears in our sky. Europa’s magnetic field shields its surface from Jupiter’s deadly radiation.
Can Europa support life?
For Europa to be
potentially habitable
, it would need to have the essential chemical ingredients for the chemistry of life. … Europa’s surface is blasted by radiation from Jupiter. That’s a bad thing for life on the surface – it couldn’t survive. But the radiation may create fuel for life in an ocean below the surface.
Can we breathe on Ganymede?
In 1996, 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
.
What is Ganymede the god of?
Ganymede is the
god of homosexual love and desire
. He was a divine hero whose homeland was Troy and was the most beautiful of mortals.
Can we live on Ganymede?
Bigger than Mercury and only slightly smaller than Mars, Ganymede may host more water than all of Earth’s oceans in a subterranean ocean about 100 miles/ 160 kilometres below its crust. It’s thought that
single-cell microbial life
—extremophiles—could exist there.
Is Callisto older than Ganymede?
Callisto is
Jupiter’s second largest moon after Ganymede
and it’s the third largest moon in our solar system.
Does Europa have oxygen?
Europa does have an atmosphere, although tenuous.
This atmosphere is composed solely of oxygen
. … The water vapor splits into oxygen and hydrogen; the hydrogen then escapes from the atmosphere leaving only oxygen behind.
What are the 4 Galilean moons?
A comparison “portrait” of Jupiter’s four Galilean moons
Io, Europa, Gany- mede, and Callisto
, each with different characteristics.
Which is older Ganymede or Europa?
Even though Ganymede is also covered with ice and perhaps a subsurface liquid ocean, there are no plate tectonics like in Europa. This moon is farther from Jupiter, and mountains and grooves are signs of tidal flexing of the surface. The impact craters show Ganymede is
much older than Europa
: around four billion years.
What are the four moons?
The four moons are
Io, Europa, Ganymede, and Callisto
, in order of distance from Jupiter. (Their names derive from lovers of Zeus.) These moons provided evidence that not all celestial bodies orbit the Earth, a powerful revelation as, up until that time, astronomers considered Earth the center of the universe.
Which moon has an underground ocean?
Is there life on Jupiter’s
ocean moon Europa
? This moon has fascinated space enthusiasts for decades, since scientists determined there’s a global ocean of water beneath the moon’s icy outer crust.
