Since 1994,  Sun Day  , sometimes called World Sun Day or International Sun Day, has been celebrated in various countries on May 3.

The Sun  is the closest star to Earth, all others are immeasurably farther away. For example, the closest star to our planet, Proxima, from the Alpha Centauri system, is 4.22 light years away from the Sun.

For the Earth, the Sun is a powerful source of cosmic energy. It provides light and heat necessary for the plant and animal world, and forms the most important properties of the atmosphere

All living things on Earth are warmed by the Sun (Photo: solarseven, licensed by Shutterstock.com)

In general,  the Sun determines the ecology of the planet . Without it, there would be no air necessary for life – the air would turn into a liquid nitrogen ocean around frozen waters and icy land. For us, earthlings, the most important feature of the Sun is that  our planet arose around it , and  life appeared on it .

The sun, wind, sea waves and biomass are energy raw materials that constantly surround us and are easy to use. They do not need to be extracted from the earth. They do not lead to the formation of radioactive waste, and do not produce toxic waste at all. This is renewable energy.

To draw attention to the possibilities of using renewable energy sources and to remind people that the Sun is vital for life on Earth, the European Section of the International Solar Energy Society (ISES-Europe) organizes, on a voluntary basis, the annual observance of  Sun Day on May 3 .

Enthusiasts and professionals, public organizations and companies from different countries organize events and promotions related to demonstrating the possibilities of solar energy.

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