Double stars - Observers' manuals.

Observing and measuring visual double stars by: (Electronic resources)

Binary starsselected topics on observations and physical processes : lectures held at the Astrophysics School XII, organized by the European Astrophysics Doctoral Network (EADN) in La Laguna, Tenerife, Spain, 6-17 September 1999 / by: (Electronic resources)

Black holes in binaries and galactic nucleidiagnostics, demography, and formation : proceedings of the ESO workshop held at Garching, Germany, 6-8 September 1999, in honour of Riccardo Giacconi / by: (Electronic resources)

Observing and measuring visual double stars by: (Electronic resources)

Double stars

Galactic nuclei

Astronomy, Observations and Techniques.

Physics.

Black holes (Astronomy)