What is the largest known moon in the universe?

Ganymede
One of Jupiter’s moons, Ganymede, is the largest moon in the Solar System. Ganymede has a diameter of 3270 miles (5,268 km) and is larger than the planet Mercury. It has a rocky core with a water/ice mantle and a crust of rock and ice.

What is the 10th biggest moon?

Biggest Moons In Our Solar System

Rank	Moon, Planet	Average Diameter
7	Triton, Neptune	2,707 kilometers
8	Titania, Uranus	1,578 kilometers
9	Rhea, Saturn	1,529 kilometers
10	Oberon, Uranus	1,523 kilometers

How big is the moon Titan?

1,599.9 mi
Titan/Radius

Which planet has large moon?

Jupiter
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Planet / Dwarf Planet	Confirmed Moons	Total
Jupiter	53	79
Saturn	53	82
Uranus	27	27
Neptune	14	14

How big is Ganymede vs Earth?

Ganymede is the largest and most massive moon in the Solar System. Its diameter of 5,268 km is 0.41 times that of Earth, 0.77 times that of Mars, 1.02 times that of Saturn’s Titan (Solar System’s second largest moon), 1.08 times Mercury’s, 1.09 times Callisto’s, 1.45 times Io’s and 1.51 times the Moon’s.

Is Titan or Neptune bigger?

It has a mass 1/4226 that of Saturn, making it the largest moon of the gas giants relative to the mass of its primary. It is second in terms of relative diameter of moons to a gas giant; Titan being 1/22.609 of Saturn’s diameter, Triton is larger in diameter relative to Neptune at 1/18.092.

Is Titan or Mars bigger?

Titan has a diameter of 5151 km and is the second largest moon of the Solar System after Jupiter’s Ganymede (5270 km of diameter). It’s actually larger than one of our planets, Mercury (4880 km) and not so much smaller than Mars (6780 km).