... Star Birth Nebulae . ... The formation of the objects we can see in space, including stars, nebulae , and the objects that are actually collections of other objects (e.g., star clusters and galaxies ), started with these raw materials. Gas makes up roughly 99% of the raw material found in space. ... Dust in space is typically found in the same clouds among the stars where gas is found. ... A galaxy is a collection of many millions or billions of stars, nebulae, and other cosmic objects. ...