The fourth yearbook of the Astronomische Gesellschaft (AG) contains 18 contributions on solar physics, solar system problems (such as dust rings around planets, and the solar wind), the first results of the Hipparcos and ROSAT space missions, protostellar and protoplanetary evol…
The third yearbook of the Astronomische Gesellschaft (AG) contains 19 contributions dedicated to the topic "Accretion and Winds". Modern developments in accretion-disk theory are presented; accretion disks are considered in close binaries, cataclysmic variables, neutron stars, a…