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How many moons are there in our solar system? Are the other moons of different colors and sizes than our moon? Are there other interesting facts about the other moons? Have any other moons been visited?
Question Date: 2008-01-10
Answer 1:

The largest moon in the solar system is Ganymede, the third of the large (Gallilean) moons of Jupiter, which is bigger than Mercury. From Ganymede, moons range down in size to grains of dust.

There is lots to know about the moons of the various planets, their composition, origin, and in some cases,their atmospheres. I cannot provide you with a treatise on all of that, but I can say that color depends on composition. Our moon is made out of basalt, which is black, but the sun is so bright that sunlight reflected off of it makes it look white. In the inner solar system, most moons are made out of rock, while farther out, they tend to be icier. So far, the only object in the solar system that human beings have ventured to from the Earth is the Earth's moon. Space probes have been sent to all of the majormoons in our solar system, however.

Answer 2:

All the planets have moons except Mercury and Venus, the two planets closest to the Sun.Jupiter's moons have the most variety, with some being bare rock, some being slushy ice, and at least one has hot volcanoes. Pluto's moon is the weirdest. Pluto is so small that its moon is almost as big as it is, and they both are in orbit around each other, like twiddling your thumbs. In fact, many people don't consider Pluto a planet, but call it a "minor planet" instead. It's much smaller than our own Moon.

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