Finished! Looks like this project is out of data at the moment!
Thank you everyone for ~5 million classifications in 3 days! That's amazing! Classifications are complete for now in this project. Please join our team at backyardworlds.org to continue searching for Planet 9 (and brown dwarfs)!
Discover the ninth planet in our Solar System with the Zooniverse and BBC Stargazing Live
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Message from the researcher
We have the unique chance to do something that no human has done in over 150 years - discover a new planet in our Solar System. Imagine being the first person in human history to spot Planet 9. I can't wait!
Planet 9About Planet 9
In the outer-reaches of our Solar System, far beyond Neptune, are a number of large objects that are orbiting the Sun in a highly unusual and unexpected way.
The presence of a ninth planet in our Solar System would explain these unexpected observations. However, this planet hasn’t yet been found.
Help us search for Planet 9; together we may be able to solve one of the greatest mysteries in the Universe.