PHYSICAL APPEARANCE Lewis is a small world with a diameter of approximately 6400 kilometers, a very thin, tainted atmosphere, and large salty oceans covering three-quarters of the surface of the planet. A young world, Lewis is one of several satellites of Zenthra, the only gas giant in the system. The night sky as seem from Lewis is one of the wonders of the Imperium, First the gas giant Zenthra has gorgeous multicolored bands. The ring of Zenthra has been described as "A ring of diamonds." The other four satellites of Zenthra are uninhabited, but they are bright in the night sky, which adds to the beauty of the night sky. Finally the magnetic fields of Zenthra send charged particles into the upper atmosphere of Lewis, creating striking auroras almost every night. The planet itself is equally beautiful. It has large peaceful oceans which come ashore onto sandy beaches. The land is covered by a huge variety of plants. The weather on Lewis is fairly mild. There is almost no axial tilt, yielding one constant season. One of the few drawbacks to the planet is the Yabba Tree. The Yabba Tree is not really a tree, but as it is a tall (3-5 meters) leafy plant,most people call it a tree. The tree and its 23 subspecies are the mostprolific species on the planet, and are found on all 6 continents. While the Yabba has huge flowers, that are extremely attractive, they release huge amounts of pollen. Unfortunately humans are highly allergic to this pollen. Vargr and other species derived from Terran stock also react to the pollen. The pollen accounts for the tainted atmosphere in the UPP. People who breath the pollen have a severe allergic reaction, resulting in trouble breathing, hives and an accelerated pulse. This proves fatal about half of the time,unless treated. The treatment is fairly routine, but involves a fairly extensive series of injections. After several years of being on planet ninety percent of the people become used to the pollen, and no longer have to wear filter masks. The remaining ten percent of the population never becomes used to it, and is forced to continue wearing the masks. For this reason, all buildings have extensive filtration systems. The planet's atmosphere is very thin and requires the use of compression masks.