What is the BAV ?
The Bundesdeutsche Arbeitsgemeinschaft für
Veränderliche Sterne e.V. (BAV)
(Working group for variable stars of the Federal Republic of Germany)
is the union of about
200 astronomers, amateur and professionals, mainly from the german-speaking
area, who take special interest in variable stars.
What are variable stars ?
Variables are stars, which change their brightness within periods of time
ranging from minutes to few years.
What is the goal of the BAV ?
The BAV supports the observation of variable stars by amateurs.
Part of this is the support at preparation, observation and evaluation.
More to this
What offers the BAV ?
The BAV offers support for the observation of variable stars through instructions,
documents like charts as well as recommendations and hints.
Moreover the BAV supports the communication with other observers and professionals by
conventions and meetings as well as through the WWW.
Furthermore the BAV offers the chance for the publication of observations
(also on international level).
Model of an eclipsing binary.
This are two stars which revolve around
the common center of mass (barycenter).
The lower diagramm shows the brightness of the whole system during one
More information about eclipsing binaries.
Here you can see an enlarged
picture in a separate window with additional explanations.
(ATTENTION: Filesize 1,7 MB)