Astronomical Society . ... Amateur Astronomy . ... Astronomy Travel . ... 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. ... You can see the red glow of hydrogen on many of the cards in the Cosmic Decoders Card Set . ... The term dust in astronomy simply means individual grains of solid material (denser collections of atoms and molecules ). ...