when in bonn, she worked on problems of stellar statistics and on spectral classification of stars, publishing the bonn spectral atlas (in two volumes). in muenster, with a dedicated team of young researchers, she organized the muenster redshift project (mrsp), a method to derive redshifts from uk schmidt telescope objective prism plates, and the muenster red sky survey, a galaxy catalogue of the southern hemisphere, based on eso schmidt direct red plates. with the mrsp data, first indications of the action of the cosmological constant were found, shortly before major supernova searches established its existence without doubt.