Two-dimensional high-resolution spectroscopy of quiet regions on the sun

In this communication we briefly review the content of Cephei pulsating stars in young open clusters. The actual metallicity differences between clusters are suggested to be detectable as variations of the location of these stars in the photometric diagrams. We make a quantitative estimate of these differences and comment on the connections with the existence and possible determination of a metallicity gradient in the galactic plane.Paper presented at the 11th European Regional Astronomical Meetings of the IAU on New Windows to the Universe, held 3–8 July, 1989, Tenerife, Canary Islands, Spain.