How are clouds formed? It turns out that the “culprits” of this process are cosmic rays. And the temperature of our planet depends on cloud cover. More cosmic rays mean it's colder on Earth. Flows of charged particles from space are decreasing - the planet is warming. Is it that simple? No, of course it’s not easy; the picture is much more complex and... exciting! In their book, published for the first time in Russian, Danish physicist Henrik Svensmark and English writer, popularizer of science Nigel Calder explain how our native Sun and distant galaxies participate in the formation of the weather above our heads.