[Why are the farthest planets in the solar system so big]Uranus and Neptune are the most distant planets in the solar system, about 2 billion to 3 billion miles away from the sun. They are the sentinels of the outer solar system. Most people pay little attention to these two ice giants, or even think they have nothing to do with us. They are not even as well-known as their little brother, the dwarf planet “Pluto” with its own “love”. Yet their size and location have long been a mystery to planetary astronomers. Because in a way, they shouldn’t exist, or at least they shouldn’t exist where they are. What scientists can’t understand is how these giant planets got so big and so far from the sun. Why scientists have such questions, let’s go back to 4.5 billion years ago…when the solar system was born. In the beginning, the sun was ignited by a disk of gas and dust. At the same time, the rocky cores of the first planets began to grow, colliding with debris from the disk as they orbited the sun. .
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