1 Coordination compounds are complexes that consist of one or more central atoms or ions with one or more attached molecules. 2  The central atom is called a metal, and is a Lewis Acid; 3  The attached ions are ligands, and are Lewis Bases;  The total number of attachments between metal and ligands is the coordination number.
Stars are not scattered randomly through space, they are gathered together into vast groups known as galaxies. The Sun belongs to a galaxy called the Milky Way. Astronomers estimate there are about 100 thousand million stars in the Milky Way alone. Outside that, there are millions upon millions of other galaxies also!
Just Google the two questions: How many stars are in the Milky Way and How many galaxies are in the observable universe. There are only about 5,000 stars visible to the naked, average, human eye, MinutePhysics points out.