* Definition of a Planet: A planet is a celestial body that orbits a star, is massive enough for its own gravity to make it round, and has cleared its neighborhood of other objects.
* The Sun's Formation: The Sun formed from a giant cloud of gas and dust called a nebula. It became so massive that its core ignited, creating nuclear fusion, which is what makes the Sun shine.
* The Sun's Role: The Sun is a star, not a planet. Stars are massive objects that generate their own light and heat through nuclear fusion.
While the Sun was once part of a larger cloud of gas and dust, it never met the criteria to be considered a planet.
