Geocentric model the coordinate system in order to predict the motions of planetary bodies, though doing so may make calculations easier to perform or interpret. A geocentric coordinate system can be more convenient when dealing only with bodies mostly influenced by the gravity of the Earth (such as artificial satellites and the Moon), or when calculating what the sky will look like when viewed from Earth (as opposed to an imaginary observer looking down on the entire solar system, where a different coordinate system might be more convenient). The Ptolemaic model of the solar system held sway into the early modern age;
Hottentot (racial term) "hodmandod" in the years around 1700. The reduced Afrikaans/Dutch form "hotnot" has also been borrowed into South African English as an offensive term for black people. In seventeenth-century Dutch, "Hottentot" was at times used to denote all black people (synonymously with "Kaffir"), but at least some speakers were careful to use the term "Hottentot" to denote what they thought of as a race distinct from the supposedly darker-skinned "Kaffirs". This distinction between the non-Bantu "Cape Blacks" and the Bantu was noted as early as 1684 by French anthropologist François Bernier. The idea that "Hottentot" referred strictly to the non-Bantu peoples