About time keeping, the definition of “sidereal” is “of or with respect to the distant stars (i.e. the constellations or the fixed stars, not the sun or planets)”, as defined after a google search.

Sidereal Time was filmed in 1979 in at Sayil Labna Xlapak and Kabah small ancient Maya sites in the Puuc region of Yucatan The film was completed in 1981 as a twoscreen piece for live variable ...