1 http://hdl.handle.net/10338.dmlcz/142127 1 Contents http://hdl.handle.net/10338.dmlcz/142133 Contents Dimension of dust particles in a cometary atmosphere http://hdl.handle.net/10338.dmlcz/142132 Dimension of dust particles in a cometary atmosphere Variation of the production of solar radiation during eleven-year cycle of solar activity in the wave-length range 620 Å to 11000 Å http://hdl.handle.net/10338.dmlcz/142131 Variation of the production of solar radiation during eleven-year cycle of solar activity in the wave-length range 620 Å to 11000 Å New methods of determining the parameters of the photometrical curve of a comet dust-gas model http://hdl.handle.net/10338.dmlcz/142130 New methods of determining the parameters of the photometrical curve of a comet dust-gas model