Planet Nine could solve long-standing mysteries of our solar system, and explain strange anomalies in the orbits of objects circling far beyond Neptune. Or it could be an illusion. Either way, it's still really cool. Via WiredUK (From 2018)
You might ask how, given that we regularly find evidence of planets orbiting other stars in our galaxy, we haven’t been able to confirm the location of one in our own backyard. But, at the limits of our Sun’s influence, it’s almost impossibly dark, rendering Planet Nine almost invisible.
In order for us to actually see a planet in our solar system, light from the Sun has to reach it, bounce back, and then find its way to a telescope on Earth. As a result, a planet twice as far away is sixteen times fainter. Planet Nine – depending on where it is in its orbit – is between two and twelve times more distant than the farthest known object in the solar system.
Within minutes of being taken in Chile, the raw image data is sent to the National Centre for Supercomputing Applications at the University of Illinois for some intense processing. “Raw telescope data is crap,” says Gerdes, bluntly. “It’s full of detector effects and artefacts. A lot of processing needs to be done before the data is useful for anything.”
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