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Reconstruction of average air temperatures for the last millenium
Střeštík, Jaroslav
The air temperature increase during the last century can be explained either by the enhanced green-house effect or by the regular long-term variations. These two explanations give two different forecasts as to the future climate. Reconstructed temperature series which guess the climate many centuries ago help to distinguish which model is more probable.
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Transits of inner planets across the solar disc
Střeštík, Jaroslav
In rare occasions an inner planet can be located just between the Sun and the Earth for a short time. In these cases the transit of the planet across the solar disk is being observed on the Earth. More interesting but more rare are transits of Venus because the Sun rays shine through the atmosphere of the planet. In the paper is described how these transits look and how can be observed.
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