First evidence found of two exoplanet "siblings" sharing an orbit around a distant star

Astronomers discovered a cloud of debris sharing the orbit of exoplanet PDS 70b, located 370 light-years away, indicating a possible "Trojan planet."
The debris was detected using the ALMA telescope and could represent a planet in formation or remnants of one in the same orbit as PDS 70b.
While Trojan planets have been theorized for decades, this is the first observational evidence supporting the existence of worlds sharing an orbit.
The region where the debris was found aligns with theoretical predictions for where Trojans form in relation to a planet.
Further observations planned for 2026 aim to confirm whether the debris cloud moves in sync with PDS 70b along their shared orbit.