The definition of a finger is a digit on your hand or anything that looks like or functions like a finger. Thumb - The thumb is the short, stubby finger that can rotate in all directions (opposable thumb). The anatomical name for the thumb is the 1st finger.
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 considered a dwarf planet because A., it is the smallest planet (now not considered a planet anymore) in the Milky Way and B., because a larger planet was discovered â¦ to be behind it. Therefore, Pluto is no longer officially a planet, and is now a dwarf planet, compared to the others.luto is the roman god of darkness and the underworld. When  discovered in 1930 the planet was named Pluto was inspired because  it was then the most distant planet with lit â¦ tle sunlight. Pluto has  now been reclassified as a dwarf-class planet.