Kozachok

a planned robotic Mars lander
Ukrainian folk dance

Kozachok (козачо́к, ) or kazachok (казачо́к) is a traditional Ukrainian quick paced folk dance for couples originating with the Cossacks in the 16th century. In the 17th and 18th centuries, it was performed throughout Ukraine, as well as at noble courts including in France, Hungary, Poland, and Russia. In terms of music, Kozachok is in fact a group of "Kozachok type dances", with numerous regional varieties, especially in Carpathians, under different names: "Kozak", "Haiduk", "Dzhuman", "Metanka", etc. At least 124 different melodies are recorded. Kozachok type dances play the function of "dance songs" (танець приспівка) in most of ethnic Ukrainian lands, with the exception of "kolomyika" regions (Pokuttia, Boiko Subcarpathians, and Halychyna). The first known musical arrangement of the kоzachok for lute is attributed to the Polish nobleman and composer Kazimierz Stanisław Rudomina Dusiacki in the 17th century. There are manuscript collections of kozachok melodies from the second half of the 18th century, and printed collections begin to appear toward the end of that century. Dusiacki's score was preserved in the Berlin State Library under the name "Dusiacki Buch". <! (Note: Commented out since it'd be good to get a source mentioning whether the dance is still considered a part of their folk dances, the English source just mentioned it existed in these areas)
Kozachok is a Belarusian, Russian, and Ukrainian folk dance

The Ukrainian choreographer and dancer Vasyl Avramenko, known for his standardization of Ukrainian dance, created Kozachok Podilskyi (Козачок подільський), a Cossack courtship dance native to the Podillia region, for one to four couples. He most likely learned the Kozachok Podilskyi from the theatre work he did between 1917 and 1921, sources from the repertoire of dances performed in plays generations before including plays by Ukrainian dramaturge and writer Marko Kropyvnytskyi.