Since 2006, Pluto has been considered a dwarf planet.
the only planet that scientists do not consider a planet is Pluto, (but they also found new planets in the asteroid belt.)Pluto
Pluto, but some consider that Pluto is not a planet anymore.
August 24, 2006 is the date when Pluto was consider no more a planet.
no
2006
A VERY small planet.
Mercury, Mars and Pluto if you consider Pluto as a planet.
Ceres, Pluto, Haumea, Makemake and Eris.
Charon. It's more of a satellite than a planet, unless you want to consider Pluto/Charon as a double planet. That's a little awkward, since Pluto has been downgraded to a planetoid.
Pluto was the smallest but is no longer classed as a planet, it is now a dwarf planet, so going by that, Mercury is now the smallest, followed by Mars, so it would be Mars.
Because it is not big enough. It is classed as a dwarf planet.
Pluto and Charon. That's not a bad answer, except that Pluto isn't regarded as a planet now, of course.