Occurrence rate of binary planets and exomoons around stars

Ascertain the frequency and prevalence of binary planets or exomoons orbiting stars across diverse stellar environments, quantifying how common such systems are.

Background

The discovery of Gliese 229 Ba–Bb and other substellar binary systems stimulates broader inquiries into multiplicity in the planetary-mass regime, including binary planets and exomoons.

While several isolated brown dwarf binaries include planetary-mass components, the prevalence of binary planets or exomoons around stars is explicitly stated as unclear, highlighting a need for improved detection sensitivity and multi-technique approaches.