|The largest of Saturn's moons is ____.
|The ____ occurred about 13.6 billion years ago.
|The Sun is one of the 100-400 billion stars in the ____ galaxy.
|Nicolaus ____ proved that the planets orbit the Sun.
|The ____ is about a hundred times larger than the Earth.
|The largest of Jupiter's moons is ____.
|The Great Red Spot is a persistent storm on ____.
|The only dwarf planet in the asteroid belt is ____.