Ryder System, Inc. History. Ryder System, Inc. was founded in 1933 by James Ryder as a concrete hauling company with one truck. The business expanded quickly into leasing trucks to other companies, under the name Ryder Truck Rental.
Pluto is thought to be made of mostly ice. It probably also has a small rocky core which might contain some metals. The ice on the surface of Pluto is made of frozen nitrogen, methane and carbon monoxide. The ice covering Pluto reflects a lot of sunlight making it appear brighter than it would if it had been covered with a darker rocky material. 1  Javascript must be enabled to use Cool Cosmos.
Pluto is 2,304 kilometers (1,432 miles) at the equator, and is only about the size of Russia. Pluto only has a mass of about one 400th that of Earth. Pluto is composed of several different materials, Pluto's thin crust is simply composed of ice, Pluto's mantel is quite rich in water and ice, Pluto's large core is probably about 70% rock, and 30% water ice.