In the earliest days of our solar system -- before any planets had been cobbled together -- the recently formed Sun was circled by cosmic gas and dust. Over time, fragments of rock formed from the dust and many of these orbiting rocks smashed together and some became the gradually larger components of planets-to-be. Others …
The Case Strengthens For "Planet 9"
The race is on to find the giant planet that several teams of astronomers are convinced orbits far out beyond Pluto, but is nonetheless still part of our solar system. Proving the existence of what has become known as Planet X, or Planet 9, would be a discovery for the textbooks and would inevitably change …
The Case Strengthens For "Planet 9"
The race is on to find the giant planet that several teams of astronomers are convinced orbits far out beyond Pluto, but is nonetheless still part of our solar system. Proving the existence of what has become known as Planet X, or Planet 9, would be a discovery for the textbooks and would inevitably change …
How Planet 9 Would Make Ours a More Typical Solar System
There’s been a ton of justifiable excitement these days about the possible discovery of a ninth planet in our solar system — an object ten time the mass of Earth and 200 times further from the sun. Especially in the context of the recent demotion of Pluto from a planet to a dwarf planet, …
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Many Worlds 