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Pluto is an object that orbits the sun about 3,647,000,000 miles from the sun in the outermost parts of the Solar System. This tiny object was discovered in 1930. It was called a planet because scientists thought it might be the largest object past Neptune. It measures about 1485 miles across. In 2005, scientists found another object in the neighborhood of Pluto, Eris, which measures about 1850 miles across. Because of this discovery, scientists decided that Pluto was no longer going to be called a planet. It would be called a dwarf planet.
- How much larger is the diameter of Eris than the diameter of Pluto? Show or tell the strategy you used to solve this problem.
The table below gives information about the planets in our Solar System. Use it to solve the problems you chose on the Workshop Menu: Planet Problems.
