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;
Central Philippine University Learning Center (Building), CPU Center for Local Governance and Indigenous Peoples Studies; CPU-World Bank Knowledge Development Center (CPU WB-KDC); CPU Appropriate Technology Center (CPU-APPROTECH); CPU Crop Research Laboratory; and the CPU – Social Science Research Institute. ""Central Spirit"" which has purportedly served as ""a social glue"", is a term for camaraderie, unity or reminisce the fond school day memories and activities at Central that has become symbolic of the bond that unites Centralians. "Central Spirit" is also contrast to what Central was founded for over a century before by the American missionaries and the school's vision. Moreover, there is also