IAU S240 focuses on recent advances across the broad field of binary star research.

A complete record of the formal organisational and administrative proceedings of the XXVII General Assembly of the International Astronomical Union.

Binary systems of stars are as common as single stars. Stars evolve primarily by nuclear reactions in their interiors, but a star with a binary companion can al

Astrophysical masers, naturally occurring microwave and radio-wave emissions, provide an important tool to investigate astrophysical environments. Several thous