At first, when the first satellites of Jupiter and Saturn were discovered in the 17th century, the terms "planet" and "satellite" were used interchangeably – although the latter would gradually become more prevalent in the following century.
Awalnya, ketika satelit-satelit pertama Yupiter dan Saturnus ditemukan pada abad ke-17, kata "planet" dan "satelit" sering dipakai bolak-balik, namun "satelit" semakin sering dipakai pada abad selanjutnya.