UV radiation is an important part in the electromagnetic
spectrum since the energy of the photons is great enough to produce
important chemical reactions in the atmospheres of planets and
satellites of our Solar System, thereby affecting the transmission
of this radiation to the ground and its physical properties.
Scientists have used different techniques (balloons and rockets) to
access to the information contained in this radiation, but the
pioneering of this new frontier has not been free of dangers.
The Sun is our main source of UV radiation and its description
occupies the first two chapters of the book. The Earth is the only
known location where life exists in a planetary system and
therefore where the interaction of living organism with UV
radiation can be tested through different epochs and on distinct
species. The development of the human technology has affected the
natural shield of ozone that protects complex lifeforms against
damaging UV irradiation. The formation of the ozone hole and its
consequences are described, together with the possible contribution
of UV radiation to recent climate changes. Finally, we will discuss
the the potential role of ultraviolet light in the development of
life on bodies such as Mars, Europa and Titan.
The Solar System is not isolated; other external sources can
contribute to the enhancement of the UV radiation in our
environment. The influence of such events as nearby supernovae and
gamma-ray bursts are described, together with the consequences to
terrestrial life from such events.
General
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