The solar system may have an ice giant planet | … – AlKhaleej Today

Researchers have found evidence that there was once another ice giant like Neptune, sitting between Saturn and Uranus on the edge of the solar system. This would mean there might have been nine planets in the solar system, or ten if you include Pluto before it was downgraded to a dwarf planet in 2008.
The sun was once surrounded by a disk of gas, dust and stones. Over billions of years the debris accumulated to give us the planets we know today.
The more massive planets like Jupiter, Saturn and…

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