NASA Rocket Redefines What Astronomers Think of as Galaxies

Source - NASA Science News for Nov. 6, 2014

Findings from a NASA rocket are redefining what scientists think of as galaxies. Galaxies may not have a set boundary of stars, but instead stretch out to great distances, forming a vast, interconnected sea of stars.

The complete article can be found here: http://science.nasa.gov/science-news/science-at-nasa/2014/06nov_ciber/