In the hunt for Planet Nine, astronomers eye a new search technique for the elusive world – Space.com

Finding Planet Nine
may require looking at telescope images in a different light.
Astronomers are vetting a “shifting and stacking” technique that could aid the hunt for the putative world, which some researchers think lurks undiscovered in the far outer system
, way beyond Pluto’s orbit. 
The strategy involves shifting space-telescope images along sets of possible orbital paths, then stacking the photos together to combine their light. The technique has already been used to discover some moons…

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