Two infrared sky surveys may have spotted the Solar System’s hidden ninth planet 23 years apart.

Two faint infrared dots put Planet Nine, the hypothetical ninth major planet, beyond the map built from orbital clues.

Two faint infrared detections, 23 years apart, move like one cold world. That makes Planet Nine, the hypothetical ninth major planet, a candidate, not a discovery. The possible orbit sits far outside the original prediction, and the paper gives no false-alarm odds. If the dots hold up, the outer Solar System may be hiding not the planet we imagined, but a stranger one.

• What it could changeA confirmed infrared planet would redraw the outer Solar System and split Planet Nine theory from Planet Nine evidence.
• How it touches todayAstronomers are already finding distant worlds by comparing old survey images for tiny movements.
• Our futureThe Solar System could keep expanding beyond the tidy map we mistake for the whole thing.

• Far-infrared surveys can search for distant planets through thermal emission and their motion across decades of observations.arxiv +1
• The candidate’s possible orbit lies far outside the original Planet Nine prediction, so a genuine object would not straightforwardly be the same planet proposed from Kuiper Belt dynamics.science
• The reported signal is a single close pair among many detections, and its statistical chance of occurring is not provided.bsky