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Phoenix666 [soylentnews.org] writes:

Astronomers from The Australian National University (ANU) are investigating four unknown objects that could be candidates for a new planet in our Solar System [phys.org], following the launch of their planetary search on the BBC's Stargazing Live broadcast from the ANU Siding Spring Observatory.

Lead researcher Dr Brad Tucker said about 60,000 people from around the world had classified over four million objects in space as part of the ANU-led citizen search for the so-called Planet 9.

"We've detected minor planets Chiron and Comacina, which demonstrates the approach we're taking could find Planet 9 if it's there," said Dr Tucker from the ANU Research School of Astronomy and Astrophysics.
...
"We've managed to rule out a planet about the size of Neptune being in about 90 per cent of the southern sky out to a depth of about 350 times the distance the Earth is from the Sun," he said.

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