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As a result, the first bodies found in our Solar

March 12, 2017 by James Ashley

As a result, the first bodies found in our Solar System could be a bit of a mystery, because their shapes are so small. A few small bodies were found in the Kuiper Belt, but their shapes are a bit more complex. The first is probably a small, rocky structure called the Heliocentric System with a diameter of just under a kilometer. A second was found in the Solar System's early Moon System.

"The first two are very similar," says David W. Bresciano, a planetary scientist at the University of Oxford, UK. And the third may have been an elliptical system, more like a solar system.

But as Bresciano points out, it isn't clear whether the Heliocentric system is the same as the Earth. "For one thing, the solar system is only about 1,000 years old, and that seems to be a very long time," he says. "It would be very hard to tell, given the history of the solar system."

Another interesting question is how much material could have been ejected into the Kuiper Belt earlier than that, as the early Earth's crust collapsed and the Kuiper Belt started to fill in.

But that's a far cry from the way the Kuiper Belt was formed, and it's not clear how the dust from the early Solar System settled on the surface. The idea of dust in the Kuiper Belt is supported by a long-time study of the material and its composition. In the Kuiper Belt, for example, it's thought that the surface was filled with water at a rate of only 1.6 billion years ago, but that it had been completely depleted by the time our Solar System was formed. "That's probably very much the same rate as that where the Kuiper Belt was emptied, and that's what has been seen there," says W.J. S. Leckhardt at Cornell University, and co-author of a paper published in the journal Proceedings of the National Academy of Sciences. He calls it "the Kuiper Belt of our Solar System, as close as we can get to it." That's an interesting hypothesis, given that the Kuiper Belt has been thought to be filled with water almost 100,000 years ago: the planet was already pretty wet before it left the solar system.

But it's also possible that these old, poorly-structured craters were not simply washed out by rain, as we think we