DieChecker Posted January 21, 2015 #76 Share Posted January 21, 2015 Actually the article says the two planets are at probably out at about 200 AUs, where the Kuiper Belt only goes out to about 50 AUs. Scientists are now thinking that at least 2 more planets may exist in our solar system beyond Pluto. They may be quite a bit larger than Earth. http://www.space.com...150116_38927567 At least two planets larger than Earth likely lurk in the dark depths of space far beyond Pluto, just waiting to be discovered, a new analysis of the orbits of "extreme trans-Neptunian objects" (ETNOs) suggests..... But the actual orbits of the 13 ETNOs are quite different, with semi-major axes ranging from 150 to 525 AU and average inclinations of about 20 degrees. .... The potential undiscovered worlds would be more massive than Earth, researchers said, and would lie about 200 AU or more from the sun — so far away that they'd be very difficult, if not impossible, to spot with current instruments. They say right there that it would be difficult to spot these with existing instruments. Even if the diameter is fouror five times that of Pluto, a planet that far out would get less light and the IR signature would be fainter. And so would be harder to detect then even a dwarf planet like Makemake which is about a fifth of the distance, but would have less then a fifth of the diameter. Link to comment Share on other sites More sharing options...
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