None. Ganymede is a moon of Jupiter. No moon in the solar system has moons of its own.

Yes. The stars you see from Ganymede are the same ones you see from Earth.

Because Ganymede is orbiting Jupiter whereas planets are orbiting the sun

There have been no missions to Ganymede. All the information we have gathered from Ganymede and the other moons of Jupiter have been from the Pioneer 10, Pioneer 11, Voyager 1, Voyager 2, Ulysses, Cassini, and New Horizon's spacecraft which did flyby-by of, or orbited, Jupiter. Any other information had been gathered from spectroscopic analysis from telescopes on Earth.

The seventh planet from Jupiter

Ganymede is actually quite cold with surface temperatures around -280 degrees Fahrenheit.

Because it is the biggest moon in the solar system. If you meant "moon" in your question, then your answer is here.

its Density is 1000,100001,,101,,1o1m,

m,

yes

Two of Jupiter's moons

Year: Going once around the Sun takes 12 of our years, since Ganymede accompanies Jupiter.

Day: It takes 7 of our days to orbit Jupiter once; like many moons, its rotation is synchronous, so that is also how long it takes to rotate once around its axis.

The name "Ganymede" originates in Greek mythology

Ganymede, (5,262.4 km) is the biggest.

Followed by Callisto (4,820.6 km)

Then Io (with an irregular shape approximately 3,600 km in diameter)

and finally Europa (3121.6 km)

No. The entire surface of Ganymede is ice.

Ganymede Jupiter's moon has 6 satellites in total from the north Pole on the Earth.

Ganymede has two types of terrain so it is about 60% light gray and 40% darker gray.

Yes, Mars is larger than Ganymede but mercury is not

They are all moons of gas giants.

Thousands of them.