Pluto, once considered the ninth and most distant planet from the sun, is now the largest known dwarf planet in the solar system it is also one of. Now ceres has been “promoted” to a dwarf planet see james hilton's essay on this topic1 the publicity generated by the iau in 2006 has created a teachable.
Sample essay - week 5: the pluto controversy: what's a planet, anyway this essay was developed for the amnh online course the solar system the solar .
Free essay: pluto: a planet many issues have arisen from the debate whether or not pluto is a planet some astronomers say that pluto should be classified. James b kaler is a professor emeritus of astronomy and an award-winning author as an astronomer, kaler has studied stellar evolution,.