GEOPHYSICS

Results of visual observations of night, twilight and day horizons of the Earth from the “Soyuz-9” spaceship

K. Ya. Kondrat'ev, A. A. Buznikov, A. G. Nikolaev, V. I. Sevast'yanov, O. I. Smoktiy

Leningrad State University

UDC: 629.195:551.521

Received: 20.10.1970