It isn't much of a debate now, but it centered on how to define the word 'planet'. The accepted definition ended up including a clause that a planet must dominate its orbit, which excluded bodies like Pluto. The alternative definition did not include this clause, and would have added at least 4 planets to the number then accepted.
there are no moos in are solar system
Jupiter is in the Solar System not away from it.
The moon doesn't have a number in the solar system. It's actually a piece of the Earth's core.
Saturn is the sixth planet in the Solar System, counting outward from the sun.
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Mercury is a planet in our solar system, not a solar system itself. Our solar system has eight planets, and Mercury is the closest planet to the sun.
There are zero galaxies in our Solar System. Even the smallest galaxies are much, much larger than the solar system.
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There are 8 planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.