 Due to its location and the lack of habitation on and around the Rehberg it has an almost natural dark night sky with a surface brightness of 21.75 mag/arcsec².For this reason the Sankt Andreasberg Observatory Society ("Sternwarte Sankt Andreasberg e. V.") selected a building on the southwestern part of the mountain as the site for its barrier-free observatory.>




Type Description Language

Type Description Language (TDL) is the name of a data type specification language defined in the book "Implementing Typed Feature Structure Grammars".