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;
Second term of Edmund Ho as Chief Executive of Macau Second term of Edmund Ho as Chief Executive of Macau The Second term of Edmund Ho Hau Wah as Chief Executive of Macau, officially considered part of "The 2nd term Chief Executive of Macau", relates to the period of governance of Macau since the transfer of sovereignty of Macau, between 20 December 2004 and 20 December 2009. Edmund Ho Hau Wah was reelected in mid 2004 by 300-member Selection Committee. The policy bureaux were under several reorganisations during the term as following: The Executive Council was presided by President Edmund Ho Hau Wah and consisted of total 10 members. All