Well for starters I know that the Sun in not a planet XD
No, the sun is not known as a planet!
I know Mercury is the closest planet to the sun.
The third planet from the sun
Pluto is not a planet
The sun is very near to The Planet Earth because Earth is the third planet from the sun.
The closest planet to the sun is mercury I know because I'm clever lol.
Saturn is the 6th planet out from the Sun in the solar system, is sits between Jupiter and Uranus. Saturn is 1,429,400,000 kilometers from Sun (888,187,982 miles).
Neptune is the eight planet from the sun
You mean the planet closest to the Sun, well its Mercury .... try googling solar system and you ll know in a jiffy
Within our solar system, it's really easy to tell each planet's distance from the sun. From Newton's law of gravitation, we realized that the time it takes a planet to revolve around the sun only depends on the planet's distance from the sun, and if we know the distance of one of them, we can figure out all the others. If we watch a planet move through the sky, we can see how long it takes for that one to revolve once around the sun. Then we need to know both the distance and time of one planet, and from that one we can calculate all the others. The one for which we know both the distance from, and time to orbit, the sun, is ... our Earth ! With this information, plus watching another planet to see how long it takes to orbit the sun once, we can calculate how far it is from the sun.
Earth: the planet we live on, I can't believe you didn't know that!!
There is no planet from the sun.