fuckyeahspace:  The Triangulum Galaxy, a member of our local group residing about 3 million light years away.  How do you photograph something that’s 3 million light years away? Why doesn’t it take the light from over there 3 million years to travel to whatever supercamera we have?

This is the Triangulum Galaxy, a member of our local group residing about 3 million light years away.  Below is the Io, one of Jupeter’s moon and as of January 2009, Jupiter has 49 official, named moons and 14 more unofficial ones still under consideration. How do you photograph something that’s 3 million light years [...]