Answers questions about binary stars and their formation and evolution.

The Royal Observatory of Belgium (Brussels) presents information about the HIPPARCOS mission to study double stars.

Features the Double Star Club of the league. Includes links, rules and regulation of the organization.

Illustrated document on the orbit, radial velocity and gravitational radiation of the object.

Provides information on the properties several known pairs of celestial bodies.

List of documents on measuring light curves and obtaining the approximate shape of the rotating bodies. Includes illustrations and formulas.

Technical paper describing detection, orbits, and evolution of multiple star systems.

Displays a research material made by Tohline, Cazes and Cohl about the formation of binary stars. Includes videos and references.

Presents various discoveries and findings of the device. Also shows photos, biography and history of the equipment.

Displays information on the cause and formation of interacting binary stars. Includes calculations and pictures of the event.

Features Commission 42 of the union which centers on close binary stars.

Delineates the constellation for each binary and shows the orbit with orbital period.

Provides information about binary and multiple stars. Includes discoveries, data and meetings.