it has been said that there will never
be a definition for the term planet that
will be accepted to all scientists
however the International Astronomical
Union has already said the definition of
a planet back in 2006 according to them
a planet is something that over bits
around the star but is not itself a
satellite has enough mass so it is
almost spherical in shape and has
cleared the neighborhood around its
orbit a dwarf planet on the other hand
is also a spherical object orbiting the
star but has not yet cleared this orbit
of other smaller objects planets clear
smaller objects out of their orbits by
sucking them into themselves or flinging
them out of orbit
but dwarf planets with their weaker
gravities are unable to clear out their
orbits they are basically too small to
be considered planets but too large to
fall into the small category the
International Astronomical Union has
recognized five bodies as dwarf planets
since 2008
Ceres Pluto Eris Haumea and Makemake
however there could be as many as 200
dwarf planets in the solar system and
the Kuiper belt
you