You can help expand this article with text translated from the corresponding article in Polish. (April 2012) Click [show] for important translation instructions. View a machine-translated version of the Polish article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Polish Wikipedia article at [[:pl:Petr Jakeš]]; see its history for attribution. You may also add the template {{Translated|pl|Petr Jakeš}} to the talk page. For more guidance, see Wikipedia:Translation.

Petr Jakeš (2 May 1940 in Břehy – 29 November 2005 in Prague) was a Czech geologist and geochemist. He dealt mainly with geochemical and volcanic processes on Earth and on celestial bodies, research on meteorites and lunar rocks.^{[ citation needed]}

Jakeš and his colleague Josip Kleczek co-authored the 1985 general reference book The Universe and Planet Earth; it was translated into English by Stephen Finn and published in North America and Europe in 1987 by Octopus Books.

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