Answer:
Pluto, The dwarf planet.
Explanation:
As per the question, the first blank would be filled up by the 'Pluto' as in the year 2006, a study categorized or entitled it under the head 'dwarf planet' as it failed to clarify the area surrounded by its orbit and could not display certain characteristics as the other eight planets do. The second blank would be replaced with the appositive 'the dwarf planet' that functions to describe Pluto who denies to dominate its neighboring areas and takes in various miniature objects along with its gravitational strength/force which ultimately resulted in revising the favorite ninth planet as 'the dwarf planet'.