Thor had actually seen it pictured that way in many holos. In reality the Belt is mostly empty space, the asteroids widely separated, and only a few tens of thousands of them larger than a couple of kilometers in diameter. Spread over a volume of space with a mean heliocentric radius of about four hundred million kilometers and a width of tens of millions of kilometers, the mean distance among such asteroids is greater than the separation of the Moon and the Earth. Given the small size of the asteroids, it is rare for one even to be visible from another without instruments. Of course, for purposes of exploitation, some of the smaller asteroids had been moved closer to one another.Avalon was not the largest of asteroids, but it was certainly among the larger ones, with a roughly spherical shape and a diameter of a little more than 100 kilometers. It had once been known by the name of an obscure Greek goddess, but it had become customary to give the permanently-settled worldlets the names of real or mythical islands, and no resident would call it anything but Avalon, legendary resting-place of King Arthur.As Thor studied Avalon through the viewport, it had little of legendary glamour about it.
