Select the two main components of the Milky Way Galaxy from the list
The most prominent feature of the Milky Way Galaxy are these long curves of bright stars, star clusters and gas and dust.
There is evidence that supports the existence of a supermassive black hole at the center of the Milky Way Galaxy.
Extra mass is found in the Milky Way Galaxy in an area that extends ten times farther than the edge of the visible disk. This region is sometimes called a ___________ ____________.
Watch the following video about data from NASA's Fermi Gamma-ray Space Telescope. Scientists have recently discovered a gigantic, mysterious structure in our Milky Way Galaxy. After viewing, write a short explanation of what the structures are and how you think they may have developed.