Yes, no planet has its own sun.
Why?
A sun is a star: a massive, luminous ball of plasma that generates its own energy through nuclear fusion in its core (fusing hydrogen into helium).
Planets do not do this. They are much smaller and cooler, so they cannot sustain nuclear fusion. They shine only by reflecting light from their star (or, in rare cases like gas giants, by emitting some infrared from internal heat).
Clarifying the wording:
Every planet orbits a star (what we casually call “its sun”).
Earth orbits the Sun (our star).
Jupiter, Saturn, etc., also orbit the same Sun.
Exoplanets orbit their own host stars (which we also call “suns” in a general sense).
But no planet is a sun or has its own independent star-like object that it “owns” as a personal sun.
Exceptions or edge cases?
Brown dwarfs: These are “failed stars” — objects bigger than planets but too small to sustain regular hydrogen fusion. They are not planets and not true stars.
Rogue planets: These are planets that have been ejected from their star systems and float freely in space without orbiting any star. They still don’t have a sun; they are just dark and cold.
Moons or binary planets: None generate their own fusion-powered “sun.”
In short:
Stars (suns) produce light and heat through fusion.
Planets reflect or re-radiate energy but do not produce their own star-like energy.
So the statement is correct: No planet has its own sun. Planets orbit suns; they don’t possess them.