Since Pluto was down graded to a Dwarf planet in 2006, our solar system only has 8 major planets orbiting the Sun. However there are a few more Dwarf planets outside the orbit of Pluto that are being considered for Dwarf Planet status.
Planets outside our solar system are called exoplanets. Thousands of exoplanets have been discovered orbiting other stars in the Milky Way galaxy. They come in a variety of sizes and compositions, and many are quite different from the planets in our own solar system.
In going away from the sun Mercury comes before Venus and Earth comes after.
The star Polaris may have its own planetary system. Certainly none in our solar system come close to it
You can't do much better than nineplanets.org - See related link
Yes. Without it, none of the other planets would have been able to form.
Planets outside our solar system are called exoplanets. Thousands of exoplanets have been discovered orbiting other stars in the Milky Way galaxy. They come in a variety of sizes and compositions, and many are quite different from the planets in our own solar system.
because the sun likes it that way
In going away from the sun Mercury comes before Venus and Earth comes after.
The star Polaris may have its own planetary system. Certainly none in our solar system come close to it
The formation of the Solar System began billions of years ago, when gases and dust began to come together to form the sun, planets and all the other bodies in the solar system.
If you mean "why don't they orbit other objects in our Solar System", the Sun has most of the mass in our Solar System.
You can't do much better than nineplanets.org - See related link
The sun, just like the heat and light for the planets.
It provides heat and light for the nine planets that orbit it. It also keeps the nine planets in orbit. If the sun were to come to an end, all of the planets would fly in straight lines right out of the solar system and may even become trapped by another star.
We've only recently become aware that planets seem to be quite common, so the idea of "biggest solar system" has only come up recently. We have no way of knowing which solar system is "biggest".
Not all of it, but most. Other energy may come from radioactivity within the planets, or kinetic energy from objects that come in outside of the solar system. Also small amounts of radiation can come from other stars.
Yes. Without it, none of the other planets would have been able to form.