Why is pluto called dwarf planet? Share with your friends Share 1 Mehakpreet Kaur answered this Pluto is a dwarf planet because it is not big enough to be a major planet. (Earth, Mars, Mercury, etc.) There are other dwarf planets in our solar system, too. -1 View Full Answer Trisha answered this pluto is called dwarf planet because it has become very small and getting invisible day by day. 0 Syed answered this because it is not like other planets in good order 0 Baani Bhatnagar answered this hey guys, i checked and found this answer...a planet has to meet three conditions, which are:It needs to be in orbit around the Sun – Yes, so maybe Pluto is a planet.It needs to have enough gravity to pull itself into a spherical shape – Pluto…checkIt needs to have “cleared the neighborhood” of its orbit – Uh oh. Here’s the rule breaker. According to this, Pluto is not a planet.so it is a dwarf planet :) 1