* The Sun is a star, not a planet. Stars are massive balls of hot gas, while planets are much smaller and orbit stars.
* There's no planet the same size as the Sun. The Sun is absolutely enormous compared to any planet in our solar system.
However, if we're looking for the planet closest in relative size to the Sun, that would be Jupiter. While still much smaller, Jupiter is the largest planet in our solar system and has a diameter about 11 times that of Earth.
Let me know if you have more questions about planets or stars!
