The Planets And Moons

2. It is a terrestrial planet and is the closest in mass and size to its orbital neighbour Earth.
3. This planet is 4.54 billion years old.
5. Jupiter’s second largest moon and the third largest moon in our solar system.
7. Discovered on December 11, 2001, by Scott S. Sheppard, David C. Jewitt and Jan T. Kleyna at the Mauna Kea Observatory, Hawaii.
10. Jupiter's fourth largest moon. It's about 90% the size of Earth’s Moon.
11. According to Sumerian texts that are many thousands of years old, the moon’s real name is ____ and was said to be Earth’s companion.

1. consists primarily of silicate rock with an ice shell outside.
4. Jupiter's fifth moon to be discovered, and the fifth-largest of the planet's 95 known moons
6. Discovered on February 9, 2003, by Scott S. Sheppard and Brett J. Gladman at the Mauna Kea Observatory, Hawaii.
8. With a mean radius of 26.7 miles (43 km) assuming an albedo of 0.04, it's only about 2 percent the size of Europa, the smallest of the four Galilean moons.
9. also known as Jupiter XVI, is the innermost known moon of Jupiter.
12. Jupiter's third largest moon, and the most volcanically active world in our solar system.