Astronomers Detect Signs of a Hidden Planet Beyond Neptune
New gravitational data revives the search for a distant world at the edge of the solar system.
Fresh analysis of the orbits of far-flung objects has renewed interest in the possibility of an undiscovered planet lurking in the outer solar system.
The gravitational tug on these bodies suggests the influence of something massive and unseen, though skeptics argue the patterns could arise from observational bias.
Upcoming surveys with next-generation telescopes may finally settle a question that has captivated astronomers for over a decade.
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