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"Planet X" today means the Planet Nine hypothesis: Batygin, K. & Brown, M. E. (2016), "Evidence for a Distant Giant Planet in the Solar System", The Astronomical Journal 151:22. Not observed
Planet Nine has not been observed. Rubin Observatory began its 10-year LSST survey on 29 June 2026 lsst. Every Planet Nine visual in this site is an artist's concept.
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When Rubin finds something, you'll hear it here, with the sources.
Every number on screen points to one of these. Accessed 27 Oct 2026. Machine-readable: sources.json.
Not affiliated with, or endorsed by, NASA, JPL, ESA, ISRO, the EHT, Rubin Observatory, SpaceX or any company.
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Textures load in steps: a 1K preview first, then 4K, capped at 4K. The opt-in Ultra preset adds one 8K Earth surface when Earth fills the screen. Rendering pauses whenever this tab is hidden.
Clyde Tombaugh found Pluto by flipping between two photographic plates of the same patch of sky. Stars stay fixed, but a distant world shifts. Flip between frames A and B and click the moving object. These frames are simulated training data, not real survey images.
LSST, the 10-year survey, began on 29 June 2026. Solar-system detections ramp up as template images build.
rubinobservatory.org ↗Schematic only. Computed from the approximate best-fit elements in Brown & Batygin (2021) (a≈380 AU, e≈0.2, i≈16°), weighted by time spent at each point. See arXiv:2108.09868 for the real map.
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Your transmission becomes a beacon star in this sky.
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