Double stars – also called binary stars – are pairs of stars revolving around common centres of mass (barycentres). Single stars, such as our Sun, are the exception.
Observing double stars
Visual double stars are among the easiest of all astronomical objects to observe. A well-equipped observatory and large telescope is not required, and double stars can also be easily observed from locations suffering from moderate light pollution. Find out more in this brief introduction to observing double stars.
News and articles
An archive of double star news items and articles is available. Regular features include a “Double Star of the Month” essay.