No. The statement is shocking in its glaring falseness. Pluto has been labeled
a dwarf planet, and to this date, five of its moons have been discovered.
Also, Haumea (2), Makemake (1) and Eris (1) have moons.
Even some asteroids may have tiny moons. One NEO (Near Earth Object), 1994-CC, is an asteroid about 700 meters wide with two orbiting asteroidal moons a few meters across.
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Pluto ... which I think was the first member of the newly-defined
"dwarf planet" category ... has five known moons.
Also,
Haumea has two moons.
Eris has one moon.
The sun is not considered a planet because it is a star, not a celestial body that orbits a star like a planet does. Stars generate energy through nuclear fusion in their cores, while planets do not generate energy through fusion.
They are also known as the terrestrial planets (they have a 'terrain' or landscape, unlike the outer gas planets. They are also called the Rocky planets.
The term "planet" comes from the Greek word "planētēs," which means "wanderer." Planets are called so because, unlike the fixed stars, they appear to move across the sky in relation to the background stars.
Uranus is considered to be quite different from the other planets in our solar system due to its unique sideways rotation and extreme axial tilt of nearly 98 degrees. This distinct tilt causes Uranus to essentially roll around the sun on its side, unlike the other planets which rotate more traditionally on their axes.
Venus never goes in retrograde motion. It always rotates in the same direction as it orbits the Sun, unlike other planets that can have periods of retrograde movement.