Article starts with -> "Precise distances are difficult to gauge in space, especially within the relatively local regions of the Galaxy. Stars which appear close together in the night sky may actually be separated by many hundreds or thousands of light-years, and since there’s only a limited amount of space here on Earth with which to determine distances using parallax, astronomers have to come up with other ways to figure out how far objects are, and what exactly is in front of or “behind” what."
Read more:
http://www.universetoday.com/98624/o...#ixzz2DIaNLLUF
Nice photograph too!!!
