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New ‘exomoon’ detection challenges cosmic labels

The discovery of an exomoon in the CD-35 2722 system, orbiting a brown dwarf rather than a planet, challenges our understanding of planetary objects. The exosatellite is estimated to be at least as massive as Jupiter and orbits a highly massive companion, blurring the lines between stars, planets, and moons.

SourceESO·JournalNature·DateJul 22, 2026

Giant doubts about giant exomoons

New research from the Max Planck Institute challenges previous claims of giant exomoons around Kepler-1625b and Kepler-1708b. The study uses a computer algorithm to analyze observations, finding that 'planet-only' interpretations are more conclusive than initially thought.

SourceMax-Planck-Gesellschaft·JournalNature Astronomy·TypeData/statistical analysis·DateDec 7, 2023

Moons may yield clues to what makes planets habitable

Researchers found that only certain types of planets can form large moons in respect to their host planets. They propose that smaller planets are better candidates to host fractionally large moons. This study provides constraints for future observations and sheds light on the formation of Earth's unique moon.

SourceUniversity of Rochester·TypeComputational simulation/modeling·DateFeb 1, 2022

New observations help explain the dimming of Tabby's Star

Researchers propose that Tabby's Star is experiencing long-term dimming due to a disk of debris from an exomoon accumulating around it, blocking its light. The exomoon's outer layers are being torn apart by stellar radiation, creating dust clouds that periodically pass between the star and Earth.

SourceColumbia University·JournalMonthly Notices of the Royal Astronomical Society·DateSep 16, 2019