Four possible candidates for the elusive Planet Nine have been discovered, following an intense, three-day search involving approximately 60,000 amateur astronomers, coordinated through a Zooniverse citizen science project by Siding Spring Observatory at Australian National University (ANU). In addition, the participants in the search have classified more than four million other objects.

"With the help of tens of thousands of dedicated volunteers sifting through hundreds of thousands of images taken by SkyMapper, we have achieved four years of scientific analysis in under three days," remarks ANU researcher Brad Tucker.
read more